You keep doing things based on historic knowledge and suffer those ads, while the rest of us will move along with the times and not suffer those ads. Lest we forget? sure, but it's not like they'll be going back to that technique as it's ineffective for them.

I think it's even more worth noting that it wasn't always the case that Youtube started warning ad-blocking users and stopping playback!

Even if we suppose that a simple hosts file could somehow block YouTube ads today, YouTube would detect that. It would not fare any better than any other ad blocker.