I’ve been working in Godot for about 3 years now, and have never touched GDScript. I personally haven’t felt like a second class citizen, and have rarely run into C# specific bugs, or found the documentation was missing for C#, other than when I was using the GD4 betas.
That being said, I’m not currently targeting web or mobile with my hobby projects, and I know those are open issues with the C# support.
My 2c.
System shock 2.