It’s just what you’re rendering is getting nowhere near pushing the limits of what can be done with the gpu.
R3F gets you up to speed really quick and helps to easily onboard a larger engineering team and stay productive
At some point your scenes will become complex enough that you will want to start using instanced meshes or just move all critical things into shaders all together…and you totally can do that.
In our case r3f made these performance optimization even easier because it’s so modular