I just a few weeks ago successfully switched my father-in-law's mid-2011 iMac (out of support for years) to Nobara 40. It took some finagling with the SIP settings and some other macOS specific stuff before it would boot the liveUSB but once it did, it works flawlessly OOTB.

Pretty incredible how frictionless the transition was for him. He even chose to switch from chrome to the default firefox, despite me having setup chromium for him to compare (but he knows its there if a website doesn't load right in Firefox). He's in his 60's and not a techy person at all. Everything is so intuitive with KDE these days he picked it up no problem.

Only downside is background sync for KDE connect doesn't work on iOS yet, seems this is a sticking point for most FOSS apps for some reason. It was causing disconnect/pairing issues for us. But I showed him localsend for now and it works flawlessly for transferring photos from the phone to the computer.

He's happy with all the default apps and onlyoffice (which I switched out from libreoffice as I've found much more consistent formatting when sending/receiving to MSoffice users)(maybe this is outdated, haven't tried the new release). Printing and scanning was plug and play. Apple trackpad and keyboard auto-paired. I showed him how to setup widgets and he went nuts. Overall 9.95/10 would convert a normie again.