One of the best features of FrameMaker (6) was a preferences option that prevents the typing of consecutive spaces. A professional does not use spaces for formatting. Therefor there is need to have consecutive spaces but it often happens by accident that one types more than one space. So I would to be very happy to have a preferences option that prevents typing (and pasting) consecutive space.
By the way, I tried to add a text replacement in preferences, two spaces to one … Publisher just crashes.