The biggest group of people who need convincing that turboprops are the way to go are the pathetic individuals in some airlines' marketing departments. They believe they can not sell turboprop seats. Yet some operators have proved beyond all doubt that price is the only thing that matters. You can be as rude, unpleasant and awkward as you want and treat your customers with total contempt but as long as you are cheap you will have customers.
Turboprops will always have a future. The only thing in doubt is how many airframes will make up that future.
PM