You can already build a single wheel as long as you only target cpython, if your needs fit with the limited / stable abi (abi3). While pypy and graal have API

You can already build a single wheel as long as you only target cpython, if your needs fit with the limited / stable abi (abi3). While pypy and graal have API support they don't have abi / abi3 support, so they still have to be built on their own (and per version I think).