Since installing Safari 12 and switching to the compatible ABP, many ads that were once successfully blocked by ABP are now visible, with the result that many frequently visited sites are (to this ad-allergic user) unusable.
Is this expected to be a temporary situation as the features for the new ABP are (quickly!) improved and stabilized, and capabilities of the old ABP are restored? Or is this the result of limitations imposed by the new Safari 12 architecture, and thus likely to persist (or improve glacially)?