Im no good at predictions but an obvious question for me is how many applications based on these networks are in the wild and successful? Basically, how well h

Im no good at predictions but an obvious question for me is how many applications based on these networks are in the wild and successful? Basically, how well have these frameworks scaled? Ruby on Rails is a highly successful framework but successful applications based on it would usually be rewritten after reaching a certain size because of scaling/performance/cost issues.