It's disappointing that i3 is constrained to one window. The ability to replace Microsoft's window manager with i3 and allow linux and windows apps to be nicely tiled together would be amazing.
God I miss this. It was way ahead of the time and I guess Microsoft got their UI act together, then lost it, and are trying to find it again.
As for tiling, the best you can do are these:
https://github.com/fuhsjr00/bug.n
https://github.com/ZaneA/HackWM
The latter is by a budding Chicken Lisp; I found him and love a lot of what he does; not sure he is ready for prime-time.
As I said, stumbled upon your blog because of Chicken Lisp musings (dare I say chicken scratch)? Thanks for that, all very interesting.