just because you had a good experience with your xoom, it doesn't mean that everyone else will, and yes it's called gedifying your tablet, i did the same with my tablet as it was a uk model and was never going to get updated.
the latest jellybean update 4.1.2 completely killed my xoom, i can't use it anymore, i can't unlock the screen and have to press the power button on the back 20 times before i can swipe to unlock and use it but then 10 seconds later it locks up again and i have to do a hard reboot each time but it doesn't get any better, can't scroll down to view a webpage, can't type even one word because it gets completely unresponsive and there is nothing i can do to fix it, so i am selling it for parts and getting a note but won't touch jellybean again after that, i lost £300 because of jellybean's update, you have to understand why i am so angry about loosing that kind of money.