You probably won't gain much right now, but as the development on Organic Maps has stalled, you might encounter bugs not being fixed, no new features etc. If it stays like that, you'd probably want to switch at some point.

Didn't organic maps change to comaps ?

https://news.itsfoss.com/organic-maps-fork-comaps/

They forked it

Yea, Public Transport is not so good in Comaps, but it's planned to make it better https://codeberg.org/comaps/comaps/issues/299

Traffic data kind of requires driver tracking data to be sent to the cloud, which usually goes against the philosophy of projects like this. Unless they're obtaining it from a third party, I doubt it'll be a feature they implement.

https://codeberg.org/comaps/comaps/issues/84

That sounds like an issue with the underlying OpenStreetMap data that is used by Organic Maps (and CoMaps, and OsmAnd, and others). Map quality depends on where you are in the world and who is contributing to the maps there. If data is incomplete around you, you could contribute to it (but easier said than done, I know).

I can't say why the route would be hours longer than Google maps, but I've noticed OsmAnd~ tends to overestimate drive time for me (I think it overestimates delay from traffic lights). Or it could just be that calculating routes on your phone doesn't always give results as good as calculating routes on Google's servers.

You could use Streetcomplete to fill in the missing data yourself.

Simpler and less features but far lighter.

For me its much simpler to use and more straight forward. That being said, I feel like osmand allows you to be much more precise when selecting a route. But I havnt really used osmand that much

Best there is! I was using OrganicMaps and now CoMaps. Such a good seemingly genuine piece of software.

That's OpenStreetMap data for you - come check out the project if you'd like!

From where are you downloading the app? I've read that either F-Droid reject Android-Auto because of binary blobs, or Google have some way of blocking non-approved builds (not from the playstore) in the car.

Edit: there is another Android-Auto thread.

It didnt for me. I installed Comaps from fdroid the other day, and it didnt come up on androidauto. I guess I could try installing it from the app store and see.