Hi! That's certainly possible, and also what I'm already doing. However, it's very time-consuming to do it for every single feature. The compiler vendors already provide their feature-support tables for most features, which I've made a small bot for that watches for conformance changes. For feature support that is unclear or not provided by the vendors, I write conformance tests to verify. In my experience, this mix works best.

Thanks! I agree to an extent, but it's also the beast the industry married. So as long as it's around, we might as well "deal with it". This page is hopefully one tool that helps with that :)