For me it is very simple: I can't really see what kind of real benefits tourbillon could offer and even I had times when I could easily afford buying one, I did not.
At the same time, nobody needs a minute repeater and still I am considering saving money to get one. I even know already which one. I have been discussing with many watchmaker I respect a lot about the complications. None of them have been crazy about tourbillons and at the same time all of them dream about minute repeaters.
I have no idea why the premium for having a tourbillion is so high. At the same time as an economist I understand that the manufacturers must generate profits. And it is very simple: if somebody is prepared to pay for a tourbillion, that's just great. However, the mambers here are not very often presenting their toubillions.
Best, Kari