Have IC being stable counterpart for other teams

So this idea appeared in #1533 (comment 162980782) and #1533 (comment 163557234). I'm creating this issue for us to discuss pros and cons of ICs being stable counterparts, since it seems a bit different than what is being discussed in #1533 (closed).

I think this might also gain traction if we do implement skill-based routing, I feel that experts on the skill-based routing would end up being the stable counterpart of other groups relevant to that skill.