It's marginally easier to read, and it costs me nothing. I've been typing this way for forty years, and it takes me longer to try to single space after periods. Why should I change? I'm not asking anyone else to do it, but I'm not going to unlearn something that doesn't affect anyone else.
So that's my thing. I'm the double space after periods guy. I'll also argue with you about State's Rights and the Civil War, the correct pronunciation of the word "gif," and why imperial units remain popular despite the "obvious" superiority of metric. I also have some inflammatory opinions about conservativism, but those aren't nearly as controversial as the other ones.
My only controversial opinion is that one must always avoid "/s" indicators, as those are an instant killer of comedy. If an occasional unit of sarcasm flies over the head of another, drawing downvotes and/or unhappiness, it's a price we must endure as a society.
Do either one of you go on long rambling on-topic stories, only to talk about the undertaker throwing mankind off the hell in a cell in nineteen ninety eight?