The problem with "allowlist" is it is an ugly phrase that sounds like it was dreamt up by a bureaucrat. There is a reason we have blacklist and whitelist - they roll off the tongue. The move from master -> main was silly but at least technically superior because it is easier to say and type. "Blocklist" and "Allowlist" are worse words than "blacklist" and "whitelist" because they are the same to type and harder to pronounce aloud.

Whoever cooks up these schemes should have put more effort in. Even something like passlist and stoplist is easier to say. Throughlist. Something that sounds nice in a foreign language, maybe.