Yes, node persistence has been discussed previously, and slowly but surely many of the contrib nodes are adding this as an option.
It's something that I have raised a while ago, see ❓ DISCUSSION: Should nodes save/restore their own context?
I believe that the developers have previously said that they would want some form of consistency across the relevant nodes, instead of being implemented piecemeal.
Isn't there always 
I think that I've found your repo (Dr. Pablo Acosta?), but not your PoC. It would be great to know more about your proposal, and more detail of how you see it working.
Thanks for posting.
