Assuming you mean C (C++ is an 80s child), that’s trivially true because devices with an ObjC SDK are a strict subset of devices that are running on C.

Yes, that is why I don't find it "insane" like the grandparent does, like yeah, devices run old languages because those languages work well for their intended purpose.

You should feel that C’s longevity is insane. How many languages have come and gone in the meantime? C is truly an impressive language that profoundly moved humanity forward. If that’s not insane (used colloquially) to you, then what is?