I might get flamed but I think this is interesting. I'm a well off hobby jogger by LR standards. I've reached most of pinnacles of success: hot wife, real man etc and a decent 5k so hear me out.
I love my vaporflys but I noticed they only really get good the faster you go. Like 5k pace or so for me (3:25/k pace or faster). So I have the new zoom fly flynits and the same thing. Once you hit about 3:35/k pace they really start to light up. But running half marathon pace or slower they're great but not the same.
So maybe I've matured. A 'slow' guy like me won't get as much benefit from these shoes as someone who can run a marathon at a 3:30/k pace.
I don't know if I need to spend that kind of money in the future again. The ZFF is an amazing shoe for a faster medicore dude like me, far easier to get and just as good.