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OS/2 isn't dead: ArcaOS update brings the 1980s-era OS to modern UEFI PCs
(www.techspot.com)
Discussions on vintage and retrocomputing
loooong time since i used OS2, thought it would go somewhere, but then I thought the Amiga would and I liked BeOS
wtf would I know :)
I never had the chance to use it but those tabbed title bars were slick.
Try Haiku.
https://www.haiku-os.org/
now you use nixos correct?