I work a bit on translation of terminology w.r.t new terms, and my pet theory is that the key factor for predicting whether a proposed translation will catch on

I work a bit on translation of terminology w.r.t new terms, and my pet theory is that the key factor for predicting whether a proposed translation will catch on and get used is the syllable count; proposed terms that are short to use get used, but proposed longish terms get abandoned whenever there is a shorter alternative - perhaps they get used in official documentation, but in practice everyone tends to use the shorter alternative even if it's worse in all other aspects. From that perspective; allowlist and denylist are three syllables each; blacklist, blocklist and whitelist are two - so my experience suggests that in the end the latter will be used instead of the former whenever possible.