I asked a very similar question last year here, and while the question was about NixOS specifically, it went into a direction where the features of immutable distributions were put into focus.
My result was that because I have no use case for the replication of a setup I would not use the main feature, and other problems NixOS is solving I have already solved with my EOS setup, so it is probably not for me, not having enough advantages over my current setup.
Take a look.