Revolution is a one time event, after that it's evolution. For example microchip was a revolution and after that it evolved year after year.
iMac G4 was revolutionary and these iMac are evolutionary. There is nothing wrong about it.
Please stop. HFS+ is just fine and compared to NTFS it's magical By the way speaking about ancient file systems NTFS was introduced in 1993 and HFS+ in 1998 My 1 TB HDD is half-full and iDefrag shows 1.2% fragmentation That's pretty good.