It’s not going to be that simple. CDNs like Cloudflare are already on board with this, and Safari built a similar feature last year (and virtually no one noticed or cared). This horse has already left the barn and I’m not sure there’s anything we can do at this point.

EDIT - Oh and I didn’t think of this but Google absolutely CAN make websites update. “We’ll improve your SEO ranking if you support this new feature”. They’ve done this before and they’ll do it again.