Thank you, @davidz.
@VistaLover, you're right. If my old pc wouldn't have died, then I definitely would've continued compiling FFmpeg. But in the end I indeed don't regret it at all. I've gone from a single core AMD Athlon XP 3200+ to an 8 core (16 threads) AMD Ryzen AI Max 385 (Framework Desktop, see photos), with an integrated iGPU (Radeon 8050S) that is as powerful as an AMD Radeon RX 6600 XT. And let's not forget the NVME SSDs. The transition is enormous! Right now only the monitor I'm using is still my old Samsung SyncMaster 203B (1400x1050@60Hz), because I'm waiting for the ASUS ROG Strix OLED XG27AQWMG (2560x1440@280Hz) to become available.
For the OS I took the chance and installed Windows X-Lite instead of the normal Win11 Pro iso. Despite all the negative comments on Win11 at the moment, I absolutely love it! Very fast, light and responsive. Never regretted it.
My main internetbrowser is still Pale Moon (on WinXP it was New Moon obviously), but my absolute secondary one is LibreWolf. A lot of websites nowadays just don't work anymore with Pale Moon. I'm now typing this message also in LibreWolf. Also with the integrated uBlock Origin add-on I can watch Youtube videos uninterupted. Absolutely amazing!