Everything has been done at least once. If we don't try to improve on what's out there, no progress will ever made.

I think Osmand works fine for some things but really sucks for planning long, time-bound trips, which is my use case.

In my case, looking at a very similar set of requirements for a project yet to be started, a target audience that includes both Android and iOS and people who might be reluctant to install an app (but should have the option to "offlinify" the website they use, perfect match for PWA)