Tin... I don't know what Scala is...
Except that it sounds like one of the non-english words for Scale.
Would you say your new Amiga would have Memory-protection btw? I recently read that no Amiga had that back in the day, and it caused a lot of security-issues. Would you include something similar to Windows UA on Vista, which is the extreme of such protection, or would you add something more discrete?
Yours actually sounds like a very realistic approach I have to add, that's why I'm asking.