decentralization and small business/orgs need the small stuff, but big business needs bigger stuff. the approaches are complementary. small simple relays that are easy to set up and manage have a lower marginal cost in HR for a small user, and for the overall picture, a more resilient network, the decentralization/censorship resistance (and smaller attack surface for taking down many small targets, big systems are easier to do more damage).
the way it's played out over the history of internet services has been very clear. the more you centralize, the more brittle the system becomes.
