The downside could be that many of those glitches, resets, bugs, screen freezes, etc might still be common . . .

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I have to admit I owned a Treo 650 (unlocked GSM) only for a short time. I sent it back before the end of the 30 day warranty when I first bought it July 2005. I immediately fell in love with the device, but did not want to live with the daily system freezes and reboots. It was a tough decision to send it back, but for the $700 full price I shelled out, I expect a fully functional device. The Palm tech actually helped to convince me to return it. I almost kept it despite the issues.
I have been waiting patiently for the next generation which I have been hoping addresses all the glitches. I was expecting Cobalt to be released with the next Palm version. I hope your prediction for continued issues is incorrect.
What is Garnet? Just an incremental improvement to Palm?