That's also because he's just violently unconventional with chromaticism. There's places in late Beethoven where Urtext editors aren't sure what a specific note

That's also because he's just violently unconventional with chromaticism. There's places in late Beethoven where Urtext editors aren't sure what a specific note/accidental was intended to be: they show possibilities option A and option B (from two sources – one of which was a misprint), and even having both, the editors are undecided which one was actually the mistake. And if you study the music very carefully and think for a long time, you won't be sure either.