Why I don't leave Facebook: all my friends are on it and the product is well-made. Why I don't leave Twitter: all the interesting people I want to follow are o

Why I don't leave Facebook: all my friends are on it and the product is well-made. Why I don't leave Twitter: all the interesting people I want to follow are on it, and the product is adequate. Why I don't leave MailChimp: it's easy to use and big enough + ubiquitous enough that I trust that they have their act together regarding the technical requirements. Why I don't leave Bank of America: it provides an adequate checking account and I don't particularly have any other needs. Why I don't leave Gmail: actually I did leave Gmail, for Fastmail, but Fastmail is equally centralized. It just has a few features that Gmail doesn't offer. The main reasons I prefer a large centralized service are: 1) It's demonstrated that it's good enough for a lot of other people. 2) It's probably not going to shut down soon, especially not without warning. 3) There is some level of support available if I need it (social networks being an exception).