I think OSM is a great project and I do contribute from time to time. At a previous job where I was doing some GIS and web mapping, I went out of my way to get permission to open source my work and publish it to OSM. We did.

But in my day to day life, frankly, Maps is just a lot easier. It has traffic and Wyze real time reports built in, shows crashes and construction and parades and whatnot. It has the world's best POI database with contact information, reviews, pictures, menus, etc. It has good offline support with vector tiles. It integrates with my contacts so I can easily say "navigate to friend X's home". It's very useful... when it's accurate.

I guess I'm just practical like that, being generally supportive of OSM and open source in general, but not a purist by any stretch. If there are any other map apps, proprietary or not, that nears feature parity to Google's (especially real time traffic and reports), I'd consider switching and contributing there instead. Is anything close yet?