

If you have a USB C to C cable handy, that’s also going to work to charge other devices, loses less power to the transfer, is quicker, and also more convenient since you can keep using both phones. Of course you’ll often not have a cable, but if you do it’s probably gonna be the better option
No, they didn’t. They explicitly said that you’re free to not upgrade for now in the announcement.
They have a section in their TOS that says they can block you from using the printer if you don’t upgrade, which sucks, but that is a generic clause, doesn’t mean they’ll make use of that here, and from their communication I don’t suspect they will, at least for the time being.