I like Librem, though I am a little concerned here. I prefer if hardware and services comes from different companies. Even well intentioned, it can be easy for a company to fall into vertical integration... Imagine a Librem 5 working best with their own service, and support for alternatives being a little weaker or less prioritized.
I think it would be a huge mistake to NOT tailor a specific experience for a Linux phone since it would then be doomed to obscurity (more than just by fact of not being Android or IOS) like the million Linux desktop distributions that never "just get it" out of the box for 99% of people.