I only tried a tiling WM for a few days several years ago. I am ok using the terminal but not everything can be done easily there. In the screenshots of people setups, there are always fancy terminals. Are tiling WM good also for other GUI a part from terminals?
It can be used for other stuff. I use dwm and find that on occasion some programs aren’t nice in dwm or don’t work well. So, i suggest having both a tiling and a floating.
dwm has a tiling layout in any case, and most TWMs do too, so there’s no real reason to leave your TWM, even if you need/want foating windows.