Sadly, the to me most important parts of Maps are live navigation and live traffic status. I'm assuming you can't get those with osm (yet).
The actual maps are much better in osm than in Google.
The actual maps are much better in osm than in Google.
That reminds me, place reviews using ATProto. Kinda surprised that no map client jumped on that when it's the exact thing you need to replace a centralized service. A lot of people use Google Maps to find businesses more than directions.