if they ever add lists they could work like a “multireddit” to corral all the same type of community into one feed at least on the user-end.
There is issue #818: Support for grouping communities / multi-communities
Quoting from this statement of the devs:
we are seeing lots of requests to implement major new features, such as migration between instances, or combining similar communities. As described above, we are completely overloaded with work, and definitely won’t have time to implement these in the near future. If there is a feature you want to see implemented, you will likely need to work on it yourself, or find someone who can.