Fascinating tracker. So we started 2025 with nearly every browser under 80% and ending the year with every browser with >98% interop? That's a lot of amazing work done by a lot of teams. Incredible!
Just to clarify the meaning of the measurement, it doesn't mean they're 98% interoperable across everything, it's across the specific set of goals for 2025. (Which is still really good!)
I think they realized that shipping the features out of sync meant nobody could use them until all browsers adopted them, which took years, so now they coordinate