Kitna chalayega bhai ?.
If hardware allows than *why not*?
I changed the screen guard of my Optimus One, and now it looks as good as new. Still looks like the original O1 unpacked right out of box. The only signs of aging is *tiny* corrosion on the metallic outline of central two buttons.
I was planning to buy Nexus 5 as soon as it reaches India. But thanks to a deal on FK, I bought Nexus 7 (2012) instead. And now I don't feel like buying another Nexus. That my friend is how much cool O1 is!
Btw... about Google not using Motorola for next Nexus, well I think the next Nexus phone could surely be from them!