why do you think they are switching away from the current backend...
Slush is one of the founders of Satoshi Labs, so I think he would know what they're working on...
would satoshilabs be willing to sell me a first edition metal Trezor for 1.0 BTC ?
They've stated repeatedly that they have no plans of ever offering the metal Trezors again.
I know that but they have extras to give out when they fail which is mostly never, so I assume they have plenty left and I made an offer.