Most insurance plans have an out of pocket maximum, no?
Not since the Affordable Care Act of 2010. It got rid of benefit maximums and implemented out of pocket maximum. An out of pocket maximum up to a limit is a contradiction. The situation works exactly opposite, you first pay 100% up to deductible, then you pay a proportion according to your copay, then you pay 0% after the out of pocket maximum.
Annual out of pocket maximums are typically $5k to $10k for individual/family at any half decent employer.
Legally, the maximums are $9.1k/$18.2k.
https://www.healthcare.gov/glossary/out-of-pocket-maximum-li...