To reduce browser fragmentation and extend implementations to the full range of tools that consume and produce HTML, W3C now embarks on the stage of W3C standardization devoted to interoperability and testing (called "Candidate Recommendation").
Ah, you mean the part where all the "can-i-use" type sites have to go through the list and manually test each item with the latest version of That Browser to see if it gets a "not supported" flag.
