I have a number of concerns about pilot-ability, airworthiness for purpose and oversight - but the main problem for me is how Wingly (or similar) passengers can take a considered view of the risks of a proposed flight with so many unknowns.
I doubt many professionals here will not feel some concern about the single-piston over-water flight being sold to Isle of Man for example.
We professional pilots understand what that means in terms of risk and are free to make a knowledgable decision whether we buy it or not. Not so Joe Public who sees a very smart website, acknowledged it’s very well visually presented, and no doubt gets a (misguided) feeling that all MUST be ok.
That is wrong in my view.