That is awesome. I didn’t know there already is free OSM based navigation.
And a quick test tells me it works pretty well!
The Librem 5 could become kind of a lighthouse to show everybody just how much good & free stuff there (already) is!
Libre navigation? Just nice 
And to give back to these nice projects that make the Librem 5 possible, see donation app proposal.
@justin it appears to me that is mainly depending on the part of world (rather than rural/urban) you’re living in. And most likely most backers could live rather well with OSM only. I guess there would be little interest in additional, licensed data. I would rather go the other road and help OSM to become even more useful.