I think it's generally gotten better for insurance companies, at the expense of both end customers and providers (with the exception of providers that have vertically integrated into the ecosystem, e.g. Aetna/CVS, etc. to capitalize on the advantages that brings).

Not debatable that it has gotten worse over the last decade, mostly due to one party in the government intentionally doing what they can to chip away at the efficacy of the program, which when it launched was incredibly compromise heavy and should have been viewed as a first step towards a better, long term solution.

I had a local primary care I really liked; I never saw the Dr. there, just the Physician's Assistant typically. They were independent, and last year they made the change to go to a membership model. Basically $50/month just to be able to be a patient of their practice, and then use your insurance for care. In their notification she laid out the economics of where they currently were and it wasn't sustainable for them, based on how much they were squeezed, mostly by not being also a facility to be able to double bill insurance for facility fees + care fees. Also mentioned that the other 3 independent doctors in our neighborhood had all closed in the last 2 years.