mfryd

"Security" also includes physical security.  Locking a phone to a particular Apple ID, and parts pairing both reduce the value of a stolen iPhone.

If an iPhone is locked to a particular Apple ID, it has less value as it can't be used by anyone else.  That means the value in a stolen iPhone is in "parting" it out.  However, if the parts are locked to a particular serial number, they have less value as it can't be used to repair a different phone.

If Apple can reduce the value of a stolen iPhone, then I am safer, as it is less likely that I will get hurt by someone trying to steal my iPhone.

The real question is whether the good done by parts pairing outweighs the bad done by parts pairing.   

One solution is software.   Right now, Apple only allows the pairing of a replacement part if it was purchased from Apple.  They could change this policy.  Instead they could allow pairing of any part, unless that part was already associated with an iPhone that was locked to an Apple ID (or reported as stolen).  That would keep the advantage that the parts to a stolen phone have little value.  Yet it would allow the owner of a broken phone to sell the parts for others to use.   It also allows Apple to continue to restrict replacement parts to genuine Apple parts.

While it seems that a third part screen would not be a security risk, we used to think the same thing about third part USB or FireWire devices.  However clever people have figured out how to hack into computers using these sorts of devices.

While incandescent bulbs don't flicker much, they did have a little bit of flicker.  Back in the old days of vinyl records, I had a cardboard circle I could place over the record label.  The cardboard had a pattern printed on it that appeared to stand still when the record was spinning at the correct speed, and the pattern was illuminated by a light flickering at 120Hz.   Under Fluorescent lights (which did flicker at completely on/off) the effect was easy to see.  But even with incandescents, there was enough of a flicker that you adjust the speed. 

In terms of flickering at a higher frequency than the frame rate, that's an old technique.  Movie theaters used it for years.  While movies had 24 frames per second, they would display each frame 2 or 3 times, to yield a flicker frequency of 48Hz or 72Hz.  

The question here seems to be whether duty cycle is also an issue.   In a quick web search, I didn't find any studies that suggested it was.  I would be very interested in links to studies on the role of duty cycle.

One thing that does seem to be an issue, is how much of the field of view contains flickering.  When watching TV, looking at a tablet/phone, or using a computer, the flickering is typically constrained to the screen.  With the Apple Vision Pro, your entire filed of vision is a display.  This is more like watching an immersive IMAX® movie, then looking at a computer monitor.

If the throttling only occurred in situations where the phone was sure the battery could not keep up, the throttling seems much more reasonable.

It boils down to whether the throttling applied only to phones in situations where the phone would crash, or if it also applied to all phones, including those that had a good enough battery to keep up with peak performance.

The problem was that Type 1 was a proprietary Adobe format.   Third parties could produce fonts, but not with hinting.    Adobe wanted to keep a monopoly on the quality type business.

OpenType was created by third parties, so that hinting would be available to others.  Eventually, Adobe released the specifications for Type 1 fonts, but by then it was too late.

PostScript is primarily a Page Description Language.  It is a language used by the computer to describe to the printer what the page should look like.   PostScript is also a programming language.  You can write arbitrary programs in the PostScript language.

The first product to contain PostScript was the Apple LaserWriter.  An 8 page per minute, 300 dpi, black and white laser printer.  The reason that Apple chose PostScript for their laser printer was PostScript's programability.   The Mac internally used QuickDraw for graphics.  Apple essentially wrote a QuickDraw interpreter in PostScript.  This allowed the Mac to send QuickDraw commands to the Printer.  Thus Apple didn't have to change the internal graphics model of the Mac.  

The Mac did allow a program to send raw PostScript to the printer.  PostScript was a more powerful graphics language than QuickDraw.  Programs like PageMaker bypassed Apple's QuickDraw printing, and produced PostScript directly.  

A big advantage of PostScript is that, unlike most previous page description languages, it was NOT  tied to the physical resolution of the printer.  The same PostScript file could be printed on a 300 dpi laser printer, or a 2500 dpi Linotype image setter.  The laser printer became the proofing device, and the Linotype the final, high quality, output device.  

PDF (Portable Document Format) is essentially PostScript without programming.  

Adobe Illustrator is essentially a graphical front end for PostScript (now PDF).  There is pretty much a one to one correspondence between the tools in Illustrator version 1 and the primitives in original PostScript.

PostScript is still very much alive.  It is still the Page Description Language used by many laser printers.  The original Adobe Type 1 font format is no longer supported by the Mac, nor by Adobe products.  I guess those of us with large libraries of Type 1 fonts have to repurchase them in TrueType format...