The PPC and Intel and Apple Silicon tags all feel meta to me. Without clear guidance, they may struggle to stand alone and have limited usefulness for anyone to find questions. Let’s flesh out what each tag will be before we decide to make synonyms would be my advice. Precisely what questions belong to a tag and why not use other tags will help come to a consensus. Once we merge, it’s hard to fix, so I’d rather we have a couple extra tags for a few months than prematurely decide what to do here.
(And yes, I was a bit short with Jeff Atwood about a somewhat analogous niche tag request before I had a few years experience here using tags, so I get the slight print of me arguing against “meta” or rare tags.)
If we had some great example of which questions this helps and how they can be used, it will make a decision more obvious. Specifically, we don’t really need tags for each iOS processor family since people have problems with phones and only occasionally with a specific iOS release.