No need to CC me, I read everything here :-)

So, Flatpak bundles have a bunch of limitations due to sandboxing, one being that we can't install certain system-level components. If you install Syntalos from source or use the packages, this stuff will be automatically installed, so you won't need to worry about it.

It installs the following stuff:

• udev rules to allow access to various industrial cameras from Basler, FLIR and The Imaging Source
• udev rules to allow access to hardware by Intan Technologies for electrophysiology recordings
• A systemd snippet to ensure persistent temporary data Syntalos may have created is removed

So, you almost always want this installed. But you especially need it if you are using any USB industrial camera or Intan RHX hardware.

If you add an "Intan RHX" module or "TIS Camera" module, Syntalos will actually complain directly that you need to install this (we don't want to leave the user hanging if we can check the system for common issues). So, the fact that you haven't seen this means you may not use one of those modules. Regardless though, it's a good idea to have it installed for the temporary data cleanup alone :-)