The chess channels you're visiting are grossly overstating Alpha Zero's impact. AFAICT, it hasn't made any impact on opening theory at all. AZ's strength is i

The chess channels you're visiting are grossly overstating Alpha Zero's impact. AFAICT, it hasn't made any impact on opening theory at all. AZ's strength is in the middlegame, where it appears to be slightly better than traditional engines (like Stockfish) at finding material sacrifices for long term piece activity and/or mating attacks.