zlacker

>>RafelM+(OP)
Honestly It's not a "reasonably secure OS" but an "absurd OS", absurd because for safety we have since few decades a very lightweight and very effective solutions: Plan 9 namespaces.

Actual older than Plan 9 but still alive OSes have done limited and limiting choices but many have something "somewhat equivalent", for instance GNU/Linux cgroups (see FireJail, BubbleWrap etc) or FreeBSD Capsicum. Choosing anything heavyweight is a nonsense.

>>kkfx+Nl
Plan 9 was so far ahead of its time we still haven't caught up.

>>AnIdio+Vw
Linux has definitely caught up on all of the features the wider industry deemed essential or nice to have. There may be some things missing but that is due to little demand outside of perhaps hobbyists.