Actually, you want to know the connection between the game engine and possibility, does have connections with success and choice of game-making platform?
For success for some game- idea and creativity is most important, but I think that for example Unity using small productions or indie with bigger budgets, or start-up business people who invest, they will choose Unity developer first. It means more money- more success. More credibility more invest. Now Construct have and custom scripts and I think in the future platform not will be marked for beginners or only for visual programming for beginners and it will produce more famous games.