There are basic things StencilJS are missing, like source maps. Development has seemed to slow down on it as well. There's also no types for web components. So

There are basic things StencilJS are missing, like source maps. Development has seemed to slow down on it as well. There's also no types for web components. So, you can't statically analyze your code and know you are indeed passing in the correct property types. There are wrappers for Stencil components for React/Angular/Vue, so you can ensure typings, but it goes to show the developer experience is far superior at the framework level.