Ehh, nothing so strong as "failed". For example in Cinnamon I will occasionally install an app that doesn't have a tray icon. Or if I install an app using a chromium based browser, it doesn't have an icon associated with it. So then I tell claude to fix it. It goes out to the internet and finds a suitable icon and will set it up for me.

Or trying to get Steam to work, which is wildly better than it used to be thanks to proton, but still not quite a perfect experience. For example there's a menu compatibility setting you have to enable for some menus to work, and other menus don't work when you have hover-click enabled in the accessibility settings of Cinnamon. Those weren't fixed by Claude CLI like the icons example, but definitely identified through chats with Claude.

The only "fail" states I get into are when I'm doing homelab power user stuff, setting up ownCloud, configuring Caddy, proxmox, etc. I don't blame Linux for that though.

All in all, I would say Linux is absolutely in a state I would install on my parents' computer without fear like I would've had in perhaps 2010.