BlackBerry Z10 (CDMA)

I remember the 755P. That was my first smartphone. The OS was simple. It came from Verizon with an annoying blinking red light that could not be shut off without downloading a third party app. I chose it over the blackberry because I couldn't stand their scroll wheel navigation in the side of the device.

I actually loved the 755P.

From 2005 until now, Blackberry took that OS and added multimedia capabilities, cameras, HD video, then went from scroll wheels to trackballs to trackpads, its own centralized app world, lightened and shrank the phones from tough bricks to delicate pancakes. and continually tweeked the OS, memory and processors.
Java based OS7 was as far as they could take that old platform.
Palm did absolutely nothing to their proprietary OS preferring to add windows on to its hardware.

To answer your question about who will pay full pop...

Probably everyone on this site as they get tired of their last phone that they have had for 1 month or so

Guinea pigs? Well anyone that bought an Android device up until now was one of those too. Anyone that bought an IOS device was one too, or WebOS, or Windows 8....

I guess you can always wait until an OS matures, but then we will be calling it old and it should have been replaced years ago

I prefer the name "early adopter" and I know better than most people on this site what the benefits and drawbacks are.