> CRL is a list that becomes huge over time - hosting it would require massive amounts of bandwidth and clients would need to download a lot of extra data.

Compared to what? 12MB JavaScript bundles and autoplay videos? Do CDNs still exist?

There's a finite number of CAs and browsers can be expected to perform caching. Delta CRLs also exist and the CAs can decline to include expired leaf certs.

This sounds like a made up problem that was solved 25 years ago.