Eh I think things like vimium have kinda solved this.

Push a button, every icon is now labeled with a key, type that key, counts as a click, done.

I get that this does NOT solve for say, someone who's blind (i guess you could announce them, not sure), but it is easy enough I've found even lower tech people are fine with it.

As always, a lot of the trick is communicating the interface and using modern standards, not "Well it's ctrl + insert because that's what it is on linux"

> Push a button, every icon is now labeled with a key, type that key, counts as a click, done.

So, omits the text-labelled buttons?