i think i might have missed something
As far as I am aware, there is no current mechanism on iOS to block ads in Safari. (Or that there are extensions in Safari at all, regardless of platform)
So the statement
"the feature could kill popular advertising blockers" which (at least to me) implies that people might stop using "popular advertising blockers" to use the Apple version instead, can not be accurate, as there are no "popular advertising blockers" on iOS (or Safari), at this time.
You can't take business away from someone, if they have no business to start with.
If there are 'popular advertising blockers' on iOS, could someone kindly point me towards one, as it would be quite nice to have. I have used our friend google, and only got links to this story (both here and elsewhere)