There’s a turn-based RPG sale/event happening on Steam right now. I can’t vouch for any of those games, but new ones do exist.
As for why they seem to have declined in popularity I can only guess - smartphones happened, removing the need for a home computer from many would-be RTS gamers.
I’m Canadian. I went to a concert in Michigan (Third Eye Blind) and half the crowd had some article of clothing with the American flag on it. Not really that weird, but it’s more than I’m used to seeing Canadians sporting Canadian flag clothing.