I meant just in terms of number of airlines, we are worse off. Oh, and service quality. And comfort in flight. (Ignoring things that changed in the rest of society: in 1978 all flights had smoking sections!)
I specifically mentioned the price as the one metric that has improved. And it's a pretty important metric! But not the only one.
You can still get service, comfort, and quality on modern airlines - you just have to pay the 2026 equivalent of a 1977 coach ticket. And I'll bet today's first class is better than yesteryear's coach.