thats what systemd sockets are here for

the difference is that the folder/package structure for other package manager is open and well known
everyone can host their own i.e. apt, pacman or Flatpak repository with little effort

the required folder/package structure for snaps is no longer open and you cannot change the default snap repository either easily

you might be interested in pinchflat or tubearchivest which are made for this task

usage of public torrent tracker in germany is almost non-existent
the fear of getting sued by copyright laywers is pretty high