I've been trying to think through possible ways to address JS's growing complexity (something I know I'm not alone in worrying about) that are consistent with "don't break the web". I understand going in that the solution will largely lie in controlling future growth rather than removing existing features, which will always be hard and is currently near impossible. Still, I feel like deprecation/subsetting approaches might not have been adequately explored.
Before I go on proposing things without knowing what I'm talking about, though, I was hoping y'all could point me to (or help me by collecting?) some relevant data. In particular, I'm wondering: what's the distribution of the age of js files on the web, accounting for the frequency with which each page is visited? Or, more concretely: suppose you could magically get all new/newly-modified JS to only use a particular subset of the language; how long would it take for that subset to dominate the web, such that engines could heavily optimize for it? And how long until they could remove support for the rest of the language altogether? Cheers, Ethan P.S. Long time es-discuss lurker and I really admire all the great work you folks do here.
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