@strypey Agreed. I try it with every old android phone people give me... I have around 10 of them, and although I've found tutorials for every one of them, ROMs are nowhere to be found, as they were hosted on "free" servers; after some time, they are gone.
And trying, at least, to install F-Droid in old versions of android is a pain.
I thank FSFE good intentions, but right now, I think a breaking point would be to host a permanent set of every ROM possible. Don't know the legal implications, and maybe that's why nobody has done it... Or maybe funding projects like Postmarket OS?