Phoronix reported that 5.18 removed the Andes NDS32 CPU arch code. https://www.phoronix.com/scan.php?page=article&item=linux-51...
The reason they do this is because a lot of these systems can break as the internal kAPIs change all the time and the users will not know since the embedded custom distro of software + kernel is not upgraded. Support can be broken for these arches for years until someone gets these systems second hand and posts about them, but may not care to fix it or it is cheaper to replace it.
RMS calls this a major issue, specifically 32-bit support in Ubuntu. I do not agree. My last 32 bit computer died a long time ago after the battery died years ago. It was a Gateway so getting replacement parts would be difficult. I also was never able to get it to run Linux. Aside from my brother-in-law finding his old laptop no one I know uses 32 bit computers (well except for myself with my Pi Zero: ARM v6, which I used once).
It just feels like the wrong battle to pick when Linux's biggest competitor is forcing practically all PCs to use a bootloader signed with their key. Major vendors can choose to refuse to allow users to install their own key. They are already locking CPUs (Ryzens) to their brand of motherboards with a builtin fuse provided by AMD. He of course talks about it-it just feels like the 32 bit part distracts from it.