Tim via users composed on 2023-05-01 03:38 (UTC+0930):
I gave up doing upgrades, many years ago, there was so many problems with it: It took absolutely ages (it assesses the current system, finds out everything that needs to be installed, downloads it, installs it piece by piece). Conflicts needed resolving, some not very straight-forward to handle. Backups ought to be made. And you still had to assess and fix things up afterwards. It was like some kind of torture.
It's been over 42 months since I last booted a Fedora installer (to a 5.3 kernel). Upgrading Fedora has worked in excess of 100 times here (15 multiboot PCs with it). On faster machines, allocating as much as an hour for the process is a gross excess. On less weighty installations it probably can take under 10 minutes if you don't include POSTing time that on some machines takes longer than booting an OS.