Mark Shuttleworth took to Google+ to discuss the changes for Ubuntu regarding the dropping Unity announcement . . . I took the opportunity to ask him about AppImages as a format. The following is a quote from that thread.
Mark Shuttleworth:
AppImages are a pretty clean experience and I admire the work behind them. Snaps are more complex under the hood because they have deeper integration and security goals.
I then asked him about Ubuntu supporting AppImages if DEs were to support AppImages as a format.
Mark Shuttleworth:
If GNOME / KDE were to make support for AppImages a first-class thing, then we would follow in the distro, though I think we would probably want to caution users appropriately regarding security.
Well, This makes the need for Launching System even more.
The more I think about it the more I see the PortableApps model is just perfect for AppImage.
When I say model I mean the launcher and putting all of them in one library and having dedicated .home.config per AppImage (Which the launcher will take care of).