What's the single point of failure across providers?
The entire industry runs on IOUs for compute and bills paid in cloud credits, could be anywhere. Could of course also be a a plain old DDoS.
They all have to rely on each other's LLMs to solve their own internal problems now.
Users perceiving the products as largely interchangeable and quickly DDoS'ing the other providers when one is down. So much for the possibility of a moat.