As there have been a couple of questions about this recently, this gives a hard timeline on typed pointers support.
Given that we are about a month away from LLVM 16 branching, I think we should retain best-effort typed pointer support in LLVM 16 even if we get all tests migrated before that point.
Conversely, regardless of what the actual test migration state will be at that point, I believe we should un-support typed pointers by policy immediately after branching. Once release/16.x has been branched, typed pointers on main will no longer be supported (and can be actively broken). We only need to keep not-yet-migrated tests working, if there are any left at that point.