I think no one is asking to be able to run the latest Linux 7.** kernel on a 486.
People who are running that hardware are very likely on older versions on Linux (or other retro operating systems) and not looking to run the latest Linux anyway.
However, on the other side of the argument, why remove it? I do not believe there are any pressing security issues with keeping the code that supports those CPUs. If there are problems, they could just be left with notices of what doesn't work for the three people in the world that may affect.
I don't really think it matters either way.
If someone wants to run a current OS on a 486, there's NetBSD.
... but I do not think we should expect to run a current OS on a CPU that old. That's what the 'retro computing' genre is about. Just run an old OS on that hardware.
#retro #Linux #NetBSD