Are there any significant historical cases? The Nvidia and Arm one seems like a big deal (if it succeeds), but the others just seem like random low-hanging fruit. I feel like the ones that matter (ISPs, cell phone carriers gobbling each other up, the Microsoft/Facebook/Adobes of the world, AMD buying ATI...) never really get stopped.
I think you’re undervaluing the significance of the FTC’s everyday work, but I’ll agree with your the Federal government has not been aggressive enough in exercising its anti-trust authority.
Isn't AT&T/T-Mo a DoJ effort, not the FTC? I don't see the FTC's involvement in your links... were they cooperating behind the scenes somehow?
The Sprint one was also DoJ, according to the wiki.
I get that the FTC on paper is supposed to enforce things like that, but their track record doesn't seem great. It just feels like a zombie agency that used to have teeth a long time ago...