Because there are at least half a dozen tries behind me to help this to be at least moved forward, and almost every case ended up in silence, or with an example of why was it impossible, instead of something tangible like actually talking with...
Yes, he keep implying that he would love to ignore CTs and love VMs, because they are so much easier to handle, okay, slower, okay, crappier, okay, have a lot of problems but man, it's so comfy, especially since PX don't have to develop anything...
Very unlikely.
Proxmox developers do not work neither on this nor with criu developers, they responded that "criu does not work because X, Y and Z", and when I asked whether they want to discuss this with criu developers they did not respons...