RePalm
PalmOS was killed by its design mistakes and technical weaknesses.16 bits memory limitation, even at the time that was silly.Armlets? Extremely hard to write simple native code or to port apps and games from other platforms.No file system, a custom and rather slow database instead…But they had tons of documents on how to follow their UI/UX guidelines.Basically, they had no real kernel upon which building an OS, they tried anyway and it was a mess of epic proportions.