I thought that in the current models (the Trezor 1 and the Trezor Model T), whether it is bitcoin ONLY or multi-coin is a kind of a software setup.  So when you initially set up the device, you can choose whether to set up for bitcoin only or for multi-coin.. and if you want to change back to the other, then you have to erase the device and start over. 

Or maybe I am wrong.. in the older devices it is firm ware, but the firmware can still be changed back and forth, no?

So now, in the newer version, there is a kind of difference in the hardware that the consumer has to choose which one and cannot elect how to set it up after receiving it?