They are not trying to kill advertisements. They want to replace API to provide better performance. That's about it. ad blocking extensions won't disappear. May be some will, and new extensions emerge.
The replacement API is incompatible with what it is replacing. The supposed gain in performance is not without loss in ability to block ads.
> ad blocking extensions won't disappear. May be some will, and new extensions emerge.
Some kinds of ad-blocking is simply impossible in the new API, without replacement or workaround. No extension can implement those methods.
once they're in total control of how the blockers can operate: I doubt they'll be responsive to what the developers of the blocking extensions want...
This is how a company implements measures that could be a legal problem: By formally making a technical decision and having the actual goal as a by-product of that decision.
It's funny because for years MS kept officially supported, feature complete, portable format for use in interchange, while DOC being shared was kinda unintended consequence that just wasn't fought against.
The very requirements of the original DOC spec required it to be a memory dump.
So they say. I see literally no reason to believe that claim, though.