B-Holic -- I'm glad you like your TPU's. It is a free country, and you're free to shoe on whatever makes you happy.
But as Rico says, comfort is individual and subjective. It's not a coincidence that the vast majority of competitive bowlers wear Dexters. Go to a major senior event (US Open, Masters) where you're bowling lots of games over a full week and look at what they're wearing. Most of the time it's a Dexter shoe, and it's by choice. Nobody choses discomfort when there are better options. That's proven in the real world over and over.
As I outlined in the topic I started, the new Dexter "9s" correct whatever flaws were present in the SST8s, real or imagined. When your TPU's wear out, they're at least worth a look.