It never left.
The latest version of AmigaOS is 4.1, announced in July 2008:
The latest service pack was released just two months ago, on June 21, 2009:
There /is/ a legal dispute over the ownership of the OS though, as the
contractors (Hyperion) claim they were never paid by the owners (Amiga
Inc.), however the OS continues to be developed and released.
It's a great operating system with many unique features, but it shares a
fatal flaw with vanilla (non-NT) Windows - a total absence of any
security. For this reason, if you intend to run any variant of UAE on
your GNU/Linux system, please ensure you do /not/ allow it local
filesystem access - use the so-called Hardfile (disk image) method
instead, and of course *never run it as root*.
The Fedora 11 release of E-UAE:
Watch the embedded video.
| "The shepherd drives the wolf from the sheep's throat, for which
| the sheep thanks the shepherd as his liberator, while the wolf
| denounces him for the same act, as the destroyer of liberty.
| Plainly the sheep and the wolf are not agreed upon a definition of
| the word liberty; and precisely the same difference prevails today
| among human creatures." ~ Abraham Lincoln
Fedora release 8 (Werewolf) on sky, running kernel 22.214.171.124-57.fc8
18:44:35 up 66 days, 22:42, 5 users, load average: 0.03, 0.08, 0.13