lproven
@kristoff @purplemonkeymad All of these are in-place same-disk snapshots. The ChomeOS system is simpler and so can be automated but you only get 1 level of undo.
I don't know any mainstream OS that does dual-failover. Deepin Linux has 2 root partitions but I don't know how it uses them.
I think Valve SteamOS does something like this. It's not just for games: it has KDE built in. There are guides to getting it running on your own hardware. You will want AMD graphics, though.
@kristoff @purplemonkeymad But watch out: you will need a *huge* root partition, because it's very easy to fill it with snapshots and if it reaches 100% it *will* corrupt.
Btrfs is tricksy: it won't give a straight answer to df -h and there is no working equivalent of fsck.
@kristoff @purplemonkeymad Try openSUSE (RPM family), Garuda Linux (Arch family), or Spiral Linux (Debian stable) or siduction (Debian testing). All have snapper and on Btrfs do snapshots and rollback.
@ChickenLadyLovesLife I was a big fan of BeOS. I reviewed it about quarter of a century ago:
... and I liked it a lot:
@ChickenLadyLovesLife @dvdnet62 Not as such. I mean it is but its drivers are 25 years out of date now. YellowTab Zeta is out there too which was updated a bit but is still ancient.
But there is Haiku. Bigger, slower, more complicated, but it does a lot more.
@UltraGiGaGigantic @geneva_convenience France did have a commercial scale fast breeder reactor, Superphénix.