Can it block YouTube ads?
For a long time I assumed Google's approach to hampering AdBlockers with MV3 was going to be the rule count limits imposed by MV3 but I think now it's more about controlling the speed that filter lists can be updated.
I use a lot of custom filters to reduce many sites I visit to a list of headlines similar to HN. Too many of them have attention grabbing crap like huge pictures.
But I'm on Firefox so this isn't a worry for me luckily.