I honestly don't know what I expected from programmers discussing typography... so much misinformation in this thread
B: I don't think I'm stubborn. I do it totally unconsciously since a very young age and it would be hard for me to change, similar to handwriting. Besides, nobody seems to notice the difference.
A: (Sigh.) Programmers just won't understand...
Sorry, but I see that last reply as neither here nor there. It's actually kind of laughable, like some stereotypical "design-snob" thing to say.
Meanwhile I've typed double spaces for multiple decades and haven't ever had anyone ask me to do it the other way. Seems you've a lot of people to educate.