Comment by 201984

The kernel is stable, but all the system libraries needed to make a grapical application are not. Over the last 20 years, we've gone from GTK 2 to 4, X11 to Wayland, Qt 4 to 6, with compatibility breakages with each change. Building an unmodified 20 year old application from source is very likely to not work, running a 20 year old binary even less so.