What do you use it for? How much does it make your experience better?

Honestly I am new to this, so I could not find anything for it. But I think YouTube will have a video or two.

Which TWM? What is the advantage over the default one?

I agree with the sentiment because it is a pain to find a distro which you want. But the reason for this is that Linux has given you the luxury to pick and choose what distro and DE you want. When you go to Windows or Mac, people just accept that it is what it is.

That being said, I will blame the Linux community to some extent for promoting “complicated” (like Arch) or too barebones distros (like Debian) to newbies. The shock of moving from Windows to Linux is already a hurdle for most. When you add the need for tinkering and troubleshooting from day one, I can see why people would quit.

We are indirectly focusing on a handful of “distros” as most distros ship with KDE, Gnome or something similar.