I think that there's a great distinction between the problem handling approach in new and old hardware. By old I mean those of the early 2000's, with 2GB of RAM or less, 32bit, etc. Shouldn't we have a tag for problems with Linux running in old computers?
It seems like a broad tag and in fact, it is. I think a lot of users turn to Linux due to it's lightness when it comes to bring old computers back to life, and a lot of problems happens there, also, there are people specialized in working with computers with less resources.
It seems like I'm talking about a hardware issue, but in fact there's a lot of problems that rise from software compatibility on old machines. There's also an ambiguity I see when defining the focus of some issues like: suppose you have an old computer running an OS, you are having trouble with the low RAM resources, but you could take measures in the OS to lower the RAM consumption. Is this a hardware or software problem? Or both?
At last, I don't think that retrocomputing SE is the place for such problems, as they state in the "questions to avoid" topic:
Questions about modern, currently supported computers are off-topic. This includes questions about earlier versions of a current machine or OS.`
Therefore, a lot of OS's coming out today to help old computers get back to life wouldn't fit in the requirements there.