Grav is the content management system that runs this website. While I could go on and on about why I was unhappy with other things, the key factor for why I like this software is pretty simple.
There are some things I've had to adapt for Learn2, as with any system and theme. I run through that on another technical page.
If you're looking to get a website running, and you want to host it yourself, Grav makes it very simple. Even if you want to take advantage of inexpensive hosting that's available, all you need is PHP7, and you will have a very responsive, snappy site.