This is nonsense.

But so is the question. MOSH interprets all the escape sequences and uses them to decide what to send to the client. That way if you tail a log file and then get disconnected, you don’t have to download every line of text that was output to your terminal while you were away; it can just send you what is currently visible.

MOSH is strictly for interactive use; never ever for automated uses like TRAMP or VSCode or sshfs.

I'm guessing they just removed LoadWB from their startup-sequence

Yes, that's all you could do. Sounds like just a slight memory fault exaggerating it, something I'm sure we're all guilty of. Booting "exclusively to amigaDOS, without the ...windowing system available" was not possible, as the CLI ran in a window.

This is correct. I just can't quite remember the exact details nowadays. But now you say it, I think that is what I had, just a single cli window :)