[rant] One space or two between sentences?

Apparently, the b/a/t/t/l/e discussion over whether to use one space or two between sentences r/a/g/e/s/o/n continues. Since I have not yet expressed my opinion on the subject, here it is:

You have got to be kidding me, right? Of all the things you could worry about in writing—characters, plot, theme and metatheme, moral center, rising and falling tension, use of language, etc. — you’re obsessed with this?

Once upon a time, when typesetters used single-letter type or operated linotype machines...