Ask for all passwords at start

[Bouni]

I want to suggest some general feature

Topgrade should ask for all passwords before the actual updates ar run. This would allow for kind of an unattended update experience.
Otherwise I have to sit and wait for the next remote host password getting asked ...

[Bouni]

I don't know how it is determined at the moment that a password is needed, especially if I have set pre_sudo = true.
With that option, do you ask for the sudo password anyway even if it not needed?
Is a child process started for every host to update? Can these processes only be handled after each other?
If not can you first handle the pre_sudo for every child process before you actaull run the updates on them?