Thanks, and great question:

Shadeup will try to fit it all into one command encoder but may need to split if the coder: 1. Manually flushes 2. Reads/downloads a buffer on the CPU

Most calls are lazily evaluated, and a small dep graph is built as you reference/draw things.

That being said, shadeup does make some perf sacrifices in the name of simplicity. I'd say it's well suited to prototyping and learning. Of course, once you have a working prototype of something porting it to native wgsl should be easy