Braille’s somewhat dying off as screenreaders become more integrated into computer systems - a system reading to you (usually at 3x speed as well) has massively more information density than a Braille display, to the point that it’s becoming less usual to learn Braille in the first place.
Last I knew, Braille displays are also pretty expensive, slow, and prone to breakage. Cool idea, but doesn’t work as well as a screenreader in practice for most people.