BlueLightning

Sometimes, an issue can occur when the device has a relatively new feature disabled on the previous release.  On MacOS, once had an OS update loop after disabling the 120 Hz ProMotion feature on a relatively new (at that time) M2 Pro MacBook Pro during a maintenance release to the first macOS version supported on that machine.  Easiest recovery (after visiting Genius Bar) was to jump to the then 1 month old version of macOS from the prior version.  Would have had to do a fresh/scratch install otherwise.  
Sonoma worked fine, but would normally have waited a few more months before skipping forward to a new macOS version.  

Generally, safest to wait a few days for updates to any supported version of an OS immediately after a new version is released (especially if critical software is running on the machine, or if it is your only machine).  Getting too old (and cranky) to work with new versions early after general availability.  We generally waited several months or even a year to update Windows machines to a new OS (and like many business users) skipped Windows 8 entirely.  

Sounds like attack can be avoided by never clicking on a calendar invite.  I'm closer to "trust no one" than "everyone is my best friend".  Manually enter calendar information.  Vaguely reminds me of a pass time with an old editor and old OS on DEC PDP-11s (in early days).  Programmers would amuse themselves by keying in a last name to see which system file the editor would corrupt or delete.  Newer text editors did not (normally) have this issue.  

Variation on hidden malicious code in graphical files (some years ago on both Windows and macOS).   Here, malicious code is contained in calendar data that is executed when adding invite to your calendar.  The malicious code may setup a future exploit, then be executed at a future time (during an OS update).  If you build a better mouse trap, bad actors will build a better mouse.   Suspect multiple other possible exploits using code injection and variations of this method.   

Probably safe to add invite if you know the sender.  UNLESS the sender received the invite from a questionable source or someone falsely claiming to be a trusted source, such as your bank or an executive at your employer.  Basically, could be a social engineering attack.  

Recently read that 90% of high dollar cyber attacks exploit remote desk top as part of the attack.  I have no way to confirm, but seems plausible.  

Rarely use the external DVD burner attached to my mac laptop.  Have never used the burner feature.  Probably use it to play back an occasional video recorded on a DVR, but only when having playback problems on multiple brands of DVD players.  Never bought a single blue ray DVD.  Largely, DVD recorders  have gone the way of answering machines (answering machine functions are still sold by a few companies mostly as a built-in feature on desk phones).  Still a lot of DVD players of various sorts.  Maybe a few times a year, play back a few VHS tapes (still have 4 working units).  

It is rarely possible to sell at the best possible high, and buy at the best possible low.  

Back some years ago, Berkshire Hathaway unloaded investments in GE and IBM.  Both continued to go down for a few years.  Both are higher now.  

When an investment is up by a large amount, many will sell part of the investment, usually part or all of the cost basis of the investment.  If the company is still solid, and the price drops, you may be able to buy it back at a lower share price in a few months or years.  I've been successful in past years swing trading Shell, IBM, Intel and a few others. Due to multiple wars, Shell has not cooperated lately (as far as falling enough to make it worth while).  I missed selling Intel when it was in the fifties the most recent time (late Dec, 2023), but in the last six years, sold several times around 50 and bought in the 20-30 range.  Intel may be a falling knife for the short to intermediate term.