One other option is for someone just to submit one or more PRs implementing the proposed feature(s). The PRs will either get accepted or rejected, and then you have your answer. The lack of response might just be because there’s not a lot that’s interesting to say.
I don’t personally think this is worth the effort to implement, and I’m not convinced I’d find it very useful in practice. But I also don’t think it’s such a big deal that it needs a big debate, or communty consensus, or a PEP. So if you want to put in the effort, just go for it.