There have been several recent announcements about Linux distributions changing the list of architectures they support, or adjusting how they build binaries for some versions of those architectures. Ubuntu introduced architecture variants, Fedora considered dropping support for i686 but reversed course after some pushback, and Debian developers have discussed raising its architecture baseline for the upcoming Debian 14 ("forky"). Linux supports a large number of architectures, and it's not always clear where or by whom they are used. With increasing concerns about diminishing support for legacy architectures, it's a good time to look at the overall state of architecture support on Linux.
A note on LWN: I was posting subscriber "free links" for a bit from lwn, but was asked to significantly reduce the frequency of that. But I would like to encourage you all to subscribe if you can, a lot of us around here are Linux nerds and they are a great ad free publication with some very indepth and technical articles