unless the market dries up over a longer period to an extent that routes now served with 120-150 seaters can be served with 80 seat turborops more efficiently (which I doubt).
Why not - isn't this the Q400's sweetspot?
You would think that leasing co's will be desperate to place them.
Given the choice of a UK domestic or near Europe route restarting on a Q400, or not re-starting at all, then I think most folk who need to travel (even those who might have previously not liked flying in something that has propellers) will be pleased to have that option?