And the downvotes from the traditionalists start. I'd go into detail, but it's honestly not worth it. I'll spend an hour typing out a long, well-reasoned post and get like 100 downvotes.

With fakebooks, there's no mention of beats and they're highly condensed. Rhythm is the time signature, that it. Fakebooks are chord progressions, maybe a melody line. They assume you already know the genre which most competent instrumentalists do.

People who are only familiar with this very staid, old fashioned Romantic-era style of composition and orchestration using sheet music tend to think everything has to be like that, has always been like that (Renaissance notation differs markedly btw) and react like you're a lunatic when you suggest it probably should be altered a lot or gotten rid of. People don't get notation actually changes. Figured bass is no longer used. We still have no meaningful notation for percussion and it's been in wide use for at least a half century in orchestral scores.

Sheet music is useful in acting as a universal language of sorts but it's not compact, at all, look at abc or something else human readable, compact and capable of being easily converted to MIDI or other machine readable format.