The problem with anything that has to be compatible with everything is that the overhead will necessarily get to a point that you can't reasonably use it in pro

The problem with anything that has to be compatible with everything is that the overhead will necessarily get to a point that you can't reasonably use it in production code. Not to say people won't still do it anyway, just that if you're looking for a bottleneck, you don't have to look very far. Until "frameworks" start being broken up into modules with individual functionality (kind of like how everyone tells you to learn how to program), there will always be churn like this. It's kind of sad to me because we'd be a lot farther in the future if there was one library that made dom elements faster than any other library, and one library that made diffing faster than any other library. But we're stuck with these monsters of frameworks that black box so hard for syntax that they completely give up on solving the problems they meant to.