It's silly, but I finally got off my butt and made a website. I was running on jekyll before, and have decided to migrate to Wagtail. Most of the things I need are "just there" and it allows me a bit more freedom to play around with Django as I'll have a live site to poke and prod.
It's also built using flex and grid (though I'm really not doing anything too fancy or exciting with either). It was EASY though, and the code feels so much cleaner than the usual soup of divs. I haven't bothered to write fallbacks for IE or older browsers, and I should, but I haven't had much time to work on this.