Once gcc13 is the default gcc used on older systems, it would be hoped that it would cover off most needs.
Up to now, though, older systems have used gcc7, and in a few cases gcc5 or gcc48 are used for specific issues. So those gcc versions may still be needed ... time will tell. If the whole gory mess of gccs are left enabled, then to get gcc48, gcc5, or gcc7, you will need to build a large bunch of needless libgccs to get them. With no buildbot, that would pretty much suck. The "better solution" is pretty clearly don't enable the needless gccs on ancient systems -- problem solved.
