What if you're on Windows where it's much less convenient? Also, latex and others substitute that for the proper dash, so one might do it out of habit. Also a

What if you're on Windows where it's much less convenient? Also, latex and others substitute that for the proper dash, so one might do it out of habit. Also also,it's en-dash, not n-dash. And it's correct in British English, where the em-dash largely fell out of use.