Yes, the performance increase per dollar curve flattens out considerably once you get to the MeoPro level.
Part of what has me asking this question is that I am considering treating myself to a higher dollar scope.
I have a highly practical side that I am doing battle with. I fought that argument over and over in my mind until I made the plunge and bit the bullet and bought me a very good Leupold VX-3L 4.5-14x56. It's a ridiculously clear scope but not much difference in practice than my Nikons. I have since bought 4 VX-3i 3.5-10X40s which contrary to what is said on here are very clear. And yes, they are a bit of a pain in the ass to site in because they don't track like some are claimed to but once sited in they hold their zero. I don't know of another scope even close in price that is as bright and light weight as these are. And they do what I want them to. End of story.