I have been making pressure on creating one format for all distros. Having many package formats is idiotism, especially for software developers like you. Flatpak is great idea. But i don’t know if it is supported by all distros and maybe under Gnome only. I’m not sure. However, what about Snap. I know probably all main distros support it or will support soon, like OpenSUSE. Ubuntu devs are ready to work for other distros. I know there’s a close cooperation between Ubuntu and OpenSUSE, so there’s a strong hope that Snap will be available in OpenSUSE Leap 42.2 that should appear at the end of this year. Hope it will be the universal file format for all distros. Devs’ life will be much easier.
Thank you. Have a good time on vacation. For sure, you deserved that :).