> If OsmAnd got a new rendering engine (no, not that "3D" sluggish thing it has for a couple years now), like streetcomplete has (or the Strava-built-in mapbox renderer), it would be possibly the best.

What "3D sluggish thing" are talking about ? Streetcomplete, like most OSM vector 3D maps use MapLibre, for a few months now https://github.com/streetcomplete/StreetComplete/pull/5693

Edit : sorry, I read Organic. Indeed OSMand is sluggish for me as well. I don't know why they went for something other than MapLibre. It's probably in-house and entangled in their code :/