Sure but this page is about not using a framework. Once you're on board with using a framework like Lit, you might as well use Preact or Svelte or a similarly lightweight framework. The "web component" angle adds no value if it's all internal to your app.
Lit is amazing though. It's fast, lean, and easy to learn. In fact, to my experience, the only things about it that are un-ergonomic, are due to the fact that it's built around web components. Lit without web components would be so much better (again, except if you're building something to be distributed to other programmers on any framework). It wouldn't have a single global registry of components, it wouldn't have that attribute mess, and I bet it'd not need a compiler at all (it doesn't need it now either, but is easier/nicer with it).
Lit is amazing though. It's fast, lean, and easy to learn. In fact, to my experience, the only things about it that are un-ergonomic, are due to the fact that it's built around web components. Lit without web components would be so much better (again, except if you're building something to be distributed to other programmers on any framework). It wouldn't have a single global registry of components, it wouldn't have that attribute mess, and I bet it'd not need a compiler at all (it doesn't need it now either, but is easier/nicer with it).