Tab width is an accessibility feature, not a preference

Indentation is not decoration — for many developers it is how the shape of the code is read.

A screen reader announces indent depth. A Braille display renders it. A low-vision developer bumps the tab width to eight columns to see structure; a developer on a narrow laptop drops it to two. With tabs, every one of them reads the same file comfortably, because the file stores one indent level per tab and lets the reader decide how wide that is.

Spaces take that choice away. They bake one person's column count into the file for everyone, forever. That is the opposite of accessible.