They will still be shipping 18.04lts, with security updates, for years to come. This will be increasingly outdated. I'd like to hear specific examples of where

They will still be shipping 18.04lts, with security updates, for years to come. This will be increasingly outdated. I'd like to hear specific examples of where that would be a problem though, besides Wine. More specifically, I don't understand what Valve is so upset about since Valve already supplies their own run time that games are recommended to use, and I hope that would apply to their photon system.