I think it's also something you don't really notice until you've used the Aeron a lot - but once you do, you'll become quite aware of it on almost any other seat. Also depends how long you're sitting in a seat at one time.
My Aeron is still one of my favorite purchases (and I paid full price for mine over a decade ago, I don't regret it).
I sit in chairs for 12+ hours a day, I recently got a standing desk though. I can't sit on the mesh without putting a cushion underneath; it's one step above concrete.
My Aeron is still one of my favorite purchases (and I paid full price for mine over a decade ago, I don't regret it).