SLAs are an artifact of the current business model where you have compute resources and I buy them from you. If we alter that model slightly where everyone buys compute from everyone else, the need for SLAs disappears completely. It's not surprising such a model would carry an immense amount of trust for availability, given it would be difficult for everyone to be 'down' all at once.
The table listing the "confidence" levels of the providers is designed to impart a certain amount of trust on the end user. The provider is basically saying "you can trust me, not because you can see how I operate my network, but because I'm willing to put my money at risk through an escrow statement that is applied to all my customers". This isn't really useful to everyone as Sue's use case may have a high net worth and Bob's use case has a low net worth.
The table listing the "confidence" levels of the providers is designed to impart a certain amount of trust on the end user. The provider is basically saying "you can trust me, not because you can see how I operate my network, but because I'm willing to put my money at risk through an escrow statement that is applied to all my customers". This isn't really useful to everyone as Sue's use case may have a high net worth and Bob's use case has a low net worth.