I do not think it is a big deal that support for those old 486 CPUs is being removed from the current Linux kernel.
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
Whoever makes the changes is responsible for making them everywhere they're needed, but if nobody is around to even test the driver and year after year it just keeps getting updated by people who are making updates to the entire codebase and they need to touch that driver... Eventually nobody even knows if it works or not, and then they decide to pull it out of the tree and somewhere someone complains...