Also, I'm curious, the changelog of the 1.6.3 update says that 80 new tokens have been added. Why do they need to be added manually and why they need to be added by Trezor in the first place since we're using MyCrypto and MEW as a third-party service?
Currently, TREZOR supports every Ethereum token which follows ERC20 standard. Support for token which follows a different standard needs to be added manually. I was told by one of the TREZOR Telegram channel admins that they do that and list such coins
here. However, I can only see ERC20 tokens there. It would make sense if they had already added Ethereum to their web wallet. Don't you think that the above list is targeted to newbies which don't understand tokens?
I'm now in 1.6.3 and even though it said "erasing..." while the update was happening and I remember reading that one of the updates will erase everything indeed, I still have my funds in the wallet and I didn't have to type my seed again?
As far as I remember, 1.6.2 update wiped my device's memory while 1.6.3 didn't. You have updated your device directly to 1.6.3 so that's the reason.