Even in the big public clouds the user facing networking really hasn't progressed beyond a layer of lipstick on top of the kludges that were created for connecting physical servers 40 years ago.

For instance in AWS you still have to care about BGP and ASNs if you want to follow the most seamless approach to create a multi-region mesh of VPCs. Why should I have to care about that? AWS already knows where all the packets came from and where they're going and should just put them in the right place. I don't care how they get there and I certainly shouldn't have to care about BGP attributes[1].

1. https://docs.aws.amazon.com/network-manager/latest/cloudwan/...