It's always "in most cases". I simply don't see space for WordPress on green field sites anymore. If something is so small it does not require CMS - it's better to use pure HTML. Otherwise "in most cases" it's better to use headless CMS.
Lit is fantastic lib as a way out from legacy web framework (since can be injected in any framework including Vue, Angular, React). I used it as a way out out of old Vue2 project