I bought mine - I own two Talos systems and a Blackbird - because I want choices in ISA, and if people want that, they'll need to spend the money. (It helps that I'm a notorious pro-PowerPC bigot, having used POWER since the RS/6000 MicroChannel days.) Other than ARM, they're the only architecture with both general OS support and processing power in the same ballpark, and while IBM may sometimes be dunderheaded, they aren't going anywhere, either.

They aren't cheap and they aren't for everyone. But it meets my needs and it puts my money where my mouth is.