The problem with having redundant virtual servers is you don't necessarily know if they are redundant or not.... Until your cloud provider has to reboot a hardware node and your primary and secondary API servers both drop dead.
That wouldn't have been so bad except one of the nodes came back up with two copies of the core software running, with competing restart scripts fighting over the network port and overwriting each other's log files.
So downstream apps were getting random, intermittent errors depending on where the load balancer sent them and which instance was active at that moment, but there was nothing to indicate a problem in the server logs because only the instance that was working at that moment was logging anything.
The Flip is squarish and unfolds into a rather tall but otherwise normal phone. The Fold is a normal-sized phone that unfolds into a squarish tablet.
They look quite nice and could actually be great devices if the folding screens are robust now. But not cheap - starting at $999 for the Flip and $1799 for the Fold.