No risk in eating expired food, eh? Or how about origin codes on lettuce? I carry a 40mm f/1.8 graphic raptar lens bought from surplus for this task.
When these "youngsters" get old, they'll bitch that the simple things went undone while talking shoes don't really do any good, and THEY were the ones inventing the talking shoes.
Also - if you think you’ve invented tech for disabled people and you haven’t talked to a single person who has the disability you are addressing, BEFORE building anything stop, talk to lots and lots of people then decide what’s next. They may not want what you have and inspiration porn is shitty.