Never an issue in what sense? In my own experience, it's not been issue because there wasn't an expectation that this should be possible. For example, text in T

Never an issue in what sense? In my own experience, it's not been issue because there wasn't an expectation that this should be possible. For example, text in Tcl/Tk label widgets cannot be copied (at least not by default). There must be a way to extract text using an a11y interface, but I haven't encountered that in practice.