Thank you so much for this amazing resource. One of my projects is a hyper-compatible framework that builds websites that span the compatibility spectrum from Netscape 3.x to today's browsers, and this is very helpful.

Oh, that is so great to hear. Glad to provide it! While writing I was very much thinking about it from the perspective of stripping things out, rather than incorporating legacy code for legacy contexts. Really interesting to think about that line of usage.