Definitely, I hear you, perfectly understandable. 🙂
Bella is currently still CPU only, but Oscar has been working on GPU. I recently posted some info about that (and some of our other current developments), here.
Regarding using a studio type of workflow, we do have the Bella GUI, but our focus is on full-featured plugins. The main purpose of our GUI at this point is to allow rendering outside of the host application, so you can keep working. We will continue to add more features to it as necessary, but it won’t be a prime focus until we have a few more plugins completed.
I’m confident I’ll be able to make a fully interactive in-SketchUp workflow that people will enjoy, as Bella is quite modern and being fully node-based, quite flexible. I have not done it yet, but it will be imperative for SketchUp, to add the ability to reference external Bella & other files, both to keep the model light, and to allow use of pre-setup/textured components that one would not want to model in SketchUp.