You can also simply use Flatpak with the Freedesktop Runtime. It runs everywhere regardless of the distribution. For games Steam offers something similar with the Steam Runtimes. You simply develop for that one container and the software will still be running in 20 years. Even though, of course, making software proprietary isn’t best practice. If you make everything open source from the start the various Linux distributions and users can adapt it themselves for their distribution and eventually modernize it as well.