interesting, YouTube channel Veritasium just published a video on how Enigma was broken during WWII. at the very end they also give message that has yet to be decoded, although apparently they're different.
I just finished watching that video, and thought to myself "I'm sure someone else with Chat GPT tokens to burn has already done that"
And then I come to hackernews and well, not quite, but I'm sure that one will be done shortly too.
Maybe both watched Tom Scott a month ago about Bletchley Park?
WRT the timing, Veritasium maybe looked at the last few weeks and decided there's a fast-closing window in which to report on any famous messages yet to be solved.