Multiple players including myself have come to the conclusion that the placement of them on the tech tree is not quite right for how powerful they are. They can somewhat trivialize certain things, such as ore processing, wetware production, and parallelization with PAuto, etc. which is not inherently bad on its own, but the issue is more how early you can access them (technically after the EV assembler). Players might use these as a crutch for their setups instead of for the real benefit of them, which would be server performance. (Well, you get both, but still.)

I think they should be either use T7 circuits in the controller recipe (gating behind the AL at the earliest), or replacing the Quantum star with a Gravi Star (gated behind Fusion T3). A couple people also think it should be hard post tank,

Usage of them should be encouraged for sure so the goal here isn't to make them unattractive, just that you should maybe have to do the things that they somewhat trivialize before actually being able to use them.