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
The package structure for snaps is very much open, as is the API for a snap store. There was for a long time an open source snap store implementation, but it died out due to lack of interest by others in actually hosting their own stores, which to me says a lot about whether people actually want to host their own repo or just want to use it as a way to complain.
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
The package structure for snaps is very much open, as is the API for a snap store. There was for a long time an open source snap store implementation, but it died out due to lack of interest by others in actually hosting their own stores, which to me says a lot about whether people actually want to host their own repo or just want to use it as a way to complain.