The world has swung the other way. If I want restaurant reviews, I need yelp/tripadvisor/googlemaps/facebook to access each database of reviews. To order a delivery meal I need ubereats/doordash/grubhub/postmates/amazon. To compare taxi prices, I need to open uber and lyft, and to rent a scooter I need a new app in each city. To send a message I need fbmessenger/whatsapp/skype/hangouts. Even Match Group keeps its subsidiaries as silos, instead of allowing interop. It probably actually INCREASES peoples desire to hop around the different products, knowing they dont work together. If gmail and outlook didnt work, id be more likely to have both. Open standards and interoperability made public networks more useful, but now that the networks are in place, and access is ubiquitous, walled gardens can spring up and dominate MUCH faster than distributed protocols.