Yeah exactly this. A lot of the humour feels very dated today, even occasionally crossing the line into offensive, but at the time it was essential viewing. There's a reason they were the most highly paid actors in TV comedy for a while (or TV in general?), later to be pipped by the cast of Frasier IIRC.

Speaking of Frasier, unlike its star, that has aged pretty well IMO, and I would still recommend it.