Comment by 3np

The issue OP is asking about is the "everything crumbles" scenario, and (from their comment down the thread):

> Most importantly securing against account termination and being unable to recover that account (like it happens a lot with Google).

We are not solving for high availability or minimizing risk of brief downtime here. The DNS part I addressed, so you're really down to two. DNS round-robin and monitoring can get you close enough to one. Until a solution like Handshake/ENS are adopted, you won't get away from the registrar.