I guess there may not be an at all satisfying answer to this question, but I want to use and help test the Thunderbird beta, and somehting has me confused. Why would the Beta have an official Snap but not a Flatpak? That makes absolutely no sense to me. Only Ubuntu and its related projects support Snap by default, and many of Ubuntu's derivatives - including Mint, which is more popular than Ubuntu itself - disable/remove Snap from the default install. Meanwhile, Flatpak is enabled by default in many other distros, including the aforementioned Mint, Fedora, and Manjaro. So, why not support flatpak?