Question: How many different passphrases does Trezor support?
It should be nearly infinite (in the human sense), since the password is effectively a 25th word to the seed. There may be a character limit though.
AFAIK the trezor doesnt effectively store anything other than the PIN and the seed - so using dozens or hundreds of passwords shouldnt be an issue
So you can have infinite and separated set of addresses at your own disposal based on the passphrase while having one single private key in the form of the seed? That's neat. Thank you.