In my experience interim CEO are used to make unpopular decisions in the company and then removed, kind of like getting New Coke and then as everyone gets mad you bring back Coke Classic but now with cheaper ingredients and everyone is happy.
Safety and trust. I know in app purchases are handled through apple and if I start a subscription, I know how to easily cancel it. I don't need to worry about my payment information being stolen or held hostage behind a convoluted cancellation process.
What other technology is being worked on my so many large companies? It may not be as performant now as other languages but I don't doubt that it will get there. The barrier to entry to build packages is also lower seeing as a lot of developers already know web technologies.