It's funny, all three of these optimizations seem like they would mainly apply to ads and tracking scripts One interpretation is that those are just one of the

It's funny, all three of these optimizations seem like they would mainly apply to ads and tracking scripts One interpretation is that those are just one of the biggest power-sinks, so they're a high-value thing to target. But a cynical take is that the Chrome team is trying to give people less reason to use an ad blocker (or just generally make ads/tracking more tolerable). Of course both can be true at the same time