Biggest example of it, is Blackberry. It ceased to exist while being a great business tool loved by managers of fat ass companies everywhere - who were more than willing to shell out a lot of cash for Blackberry servers and handsets, so money was never a problem at all, it was a key business tool for F500 corps. It only died out because users BADLY wanted the enshittified iOS experience with IG and the like that Blackberry locked them out of, and begged and lobbied their bosses to switch them over to iPhones for corporate messaging...
Adding Blackberry was just like a private forum in that it's users data was kept inside the corporation on private servers and outside the view of governments. That is a threat to many third parties that would love to have visibility into that data for a myriad of nefarious reasons. The same switch-over also happened with internal systems moving to Google docs and other centralized monitoring. I would love to see a chaos monkey test of all the big centralized systems going offline to see what breaks.
