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Touchscreens Are Out, and Tactile Controls Are Back
(spectrum.ieee.org)
This is a most excellent place for technology news and articles.
Braille isn't very good for quick discernment. It's much easier to put differently-shaped buttons together or put buttons into different places.
Why not both? And blind people don't seem to think so. Either way, better than what's in the picture.
Out of curiosity, have you actually spoken to blind people about how useful they find Braille?
Feeling for a 2cm x 1.5cm button is way different than trying to read braille.
Now try selecting between each of the buttons 2cm x 1.5cm for a particular button without having to feel the rest or having to glance at it.
Literally just bumps that are even easier to make than the text on the buttons because they are just part of the plastic mold instead of additional paint jobs. Some people are just hostile to any basic improvement.
You do realize that human touch can differentiate between .01mm? It's why braille works so easily.
Imagine trying to both make the argument that braille is too hard to distinguish and that 0.01mm is easy to differentiate in the same thread.