It’s a style choice. I find templating systems to be cumbersome when my page is really an application that changes dynamically and often. My intent is not to design a new web framework, but to give a ui to a python backend.
As far as your point on drivers, yes that’s the idea. I will move things around to make them more pluggable soon, and I expect to be releasing a whole other category of systems I can connect to in a couple weeks. However, I doubt I’ll have the time to provide a driver for many systems.