It was very common to use that on 30 and 50 amp circuits.
I never did much residential electrical as an electrician, but the big issue was aluminum wire used on 15 and 20 amp circuits, thus it is not allowed any longer on those.
It is allowed still on the 30/50 amp stuff. If it is properly sized for the load and connections are still good and properly torqued it’ll be fine. You would have to pull the receptacles out from behind the dryer and range and inspect to know that. That would also show if there has been any overheating and I would bet they could be tightened a bit more. Some guys liked using an anti oxidation grease on all aluminum connections, but it is only required on the big aluminum panel feeders. Most homes are connected to utility power with aluminum wire.