[...] ensure the snapshot complies with distrobution specific package formats
and installation standards. For example, Debian and Ubuntu have
additional Emacs site code to support those distros ability to have
multiple versions of Emacs installed at the same time. It also means
users can install the snapshots using the package management system they
are familiar with and there is less chance of causing issues when their
distro updates to newer versions.
This is a subtle but important point for anyone who is interested in semi-frequent snapshots (as opposed to releases). Under Windows, macOS, and a small subset of other systems (like Snap and Flatpak), these snapshots are typically contained to a single app-specific directory. Adding one is another directory; moving or removing one is likewise a single directory operation. On the other hand, the installed version of emacs on most GNU/Linux systems ends up with directories in several different directories, often in similar but not identical places from one distro to the next. This means that whatever tools are used to manage the snapshots need to track where things were added and, when multiple versions are installed simultaneously, which are to be removed (or shared, or overwritten). This sort of operation gets very quickly into the specifics of a distro, and thus is better handled within the mechanisms of that distro. Thankfully, this is already being done (and not just recently), for all of the major distros as far as I know, as well as for systems like Snap and (different but perhaps related) Docker.
Hope that helps,
~Chad