The only real FUD that has any basis is 1) The lack of good 3D support and 2) DOTS style architecture. These are things the community is addressing now for future releases.

The 3D support will be significantly overhauled in 4.x https://www.youtube.com/watch?v=DNJXkcQxXEg and additional enhancements will reduce the need for DOTS/ECS for many. There's also Godex https://github.com/GodotECS/godex that adds ECS to the engine.