"Going down the rabbit hole" has a pretty specific meaning. The rabbit hole looks easy and non-threatening. Once you get into it, you are led into branching, twisting, ever more complex passages, and you never find your way out again. In this case, I thought that fish previewer was just a nice, easy, useful mod. But once I installed it, I couldn't help going back and looking at all of the amazing mods available on Nexus, and now I have 8. I'm sure that there will be more to come. I've fallen down the modding rabbit hole and can't escape.