It's almost certainly NOT a normal punter asking a question like that
Rubbish. Post XL, solvency of companies with whom people have spent money is the top of many travellers' minds.
The correct, and only response to the question should have been to (a) point out Dart's profits, and (b) the sizable and stable mail contract.
Further comment was neither required nor necessary.
I shall desist from further comment on this thread and suggest other with any level of maturity do the same.