Plain text is not robust at all. Not now, and not in the futue. Its actually useless.

How do you save images in plain text ? Lot of usefull information is stored in pictures. ie: in technical articles about graphics, hardware. Or some diagrams mentioned and refereced in the text. Even medieval books have pictures, because some things need to be shown, and it is not enough to just write some text about it.

Anyway, youre probably just a very very old troll, typing this on a typewriter...