Hacker News Reader

No pianst who reads music would put up for having to misspell chords and scales, well-tempered or not.

Even in tempered music theory, calling a note a sharp or a flat generally depends on the scale.

For eg: Bb major uses: Bb C D Eb F G A Bb while A# major uses: A# B# Cx D# E# Fx Gx A# (x indicates double-sharp) Despite all the notes being exactly the same on a tempered instrument.

Creator must just not be a musician. For a composer, for a pianist, for a violinist, for a singer... etc D# and Eb are distinct things. There are extraordinarily few contexts in music history where their difference is irrelevant, such as some Schoenberg pieces but for literally anything else even for 99% of atonal pieces the difference has some kind of relevance to musicians.

Having both is still important in tempered instrument notation. Even if they sound the same, they aren't from a music theory standpoint.