Disclaimer: I’m an optimist 
Stability is definitely important. I used to develop a relatively popular plug-in for Foundry VTT, but the product was changing too fast at the beginning for me to keep up.
I have high hopes for v2.0.0. Removing a large part of the code base is going to hurt part of the current userbase, but it’s going to have a long lasting benefit of fewer issues and improved focus. Lua is very flexible/expressive, so I predict that SilverBullet will fulfill its promise of a light and stable base with great extensibility.
For serious use, I simply create plain markdown pages with a couple of queries at the moment. I have a separate space to tinker with more complicated things. When the dust of development settles a bit, I also feel more at ease to utilize more of its power in my ‘production’ notes.