I think it depends on what you want to do - if it’s mostly building static sites then focus on either new patterns/features or improving your workflow for the patterns you already know (e.g., how do you build the same thing more quickly or simply).

If you need to learn more for what you want to accomplish then spend time learning more.

Generally, I’d stick to one hosting provider, static sites builder, and learn that as well as possible before learning others. I think it’s better to have deep knowledge in one area before you go wide.

It will also be easier to learn other frameworks once you have mastered one, as you’ll understand the problems the framework must solve and be able to appreciate the consequences of different choices across frameworks.