It looks ridiculous. Should at least have been a smart watch. But I guess you can’t demand a six-figure price without making it an analog watch — no matter if it fits the design.

Vim is actually highly ergonomic; you can do everything with a minimum of keystrokes without moving a hand away to a mouse or touchpad or oven the arrow keys. If that’s worth the time investment to learn it, is a highly subjective question. But I’d say it’s a lot easier than many people think.

If you have your (encrypted) password manager file backed up to one or more otherwise unencrypted media, then remembering your master password will be enough in a pinch. But yes, for day to day password handling you’d want to have a few more memorized, e.g. the ones you’ve mentioned. As those are passwords you enter daily, it’s usually not much of a problem, especially if you use memorization techniques.