Why? Is there a single person in Universe that would ever be looking at these files and not know that txt is short for text? Perhaps in some other cases it mak

Why? Is there a single person in Universe that would ever be looking at these files and not know that txt is short for text? Perhaps in some other cases it makes sense, and perhaps we don't even need extensions at all for many files, they can be misleading (not to mention that what 'text' means is just another convention). Microsoft even hides extensions from average users. But the common extensions that we all know by heart, why change, what's the gain?