Google at least at the time had a vested interest in making external blaze a thing AND the options in open source were just "not as good". While buck2 is IMO t

Google at least at the time had a vested interest in making external blaze a thing AND the options in open source were just "not as good". While buck2 is IMO technically better, I don't think there's a compelling reason to switch and I just don't see Meta having a long-term vested interest in keeping it open and growing it.