You're totally right. I misread the situation (I assumed that this feature has already been discussed before, and that there already was a proposal for it, because the lang team had discussed it in April 2020, and the new
Try trait RFC mentions it as well).
I'm not sure if I want to write an RFC for this, because I'm not very good at it. And even if someone else does, the RFC will probably not be accepted in time to reserve the keyword in the 2021 edition. That means the feature has to wait another 3 years, but the upside is that this gives us more than enough time to flesh out the details and bikeshed the name
I would however appreciate a bit more feedback, both positive and negative, because this forum doesn't have a downvote button, which makes it difficult to get an impression of how people feel about this. Is it worthwhile to pursue this idea, or am I just wasting my time?