Just tested it again on 2023.7.20 last night and this afternoon. While historically it would introduce horrific road noise by turning it on, when I turned it on yesterday and today I can happily report it did absolutely nothing detectable. Had the wifey with me (she's exceptionally musically gifted), and she too said she could hear no difference.
Well done, Tesla! We've gone from being an absolute joke to being just a joke. I mean sure, it's not the latest software update. Us FSD'ers paid a fortune for the junk that is FSD, and also for the benefit of being months behind the non-FSD'ers in terms of features and updates. So hey, maybe ARNR works better on a later update. Guess I'll find out, someday...