How to preserve old software – with snaps | Snapcraft
snapcraft.io
If you have been using computers for some time now, you probably have fond memories of this or that piece of software from the past, an application or a game that was fun, useful and just plain great, but which isn’t available any longer. For those who have had a chance to experience the digital […]

"Take Ubuntu as an example. Each release comes with its own archives, providing specific versions of tools and their library dependencies. Usually, you cannot freely mix packages across multiple archives. For instance, packages provided in Ubuntu 16.04 may not necessarily be compatible with those in Ubuntu 19.10, and vice versa.

Often, applications are compiled against specific versions of libraries. If those libraries become unavailable, applications that depend on them will no longer run.

Snaps to the rescue."