Just two or three decades ago, the limitations on what you could keep were considerable. Nowadays, the possibilities are so vast that the hobby has evolved into numerous genres, limited only by their creators’ own imaginations. That huge variety is reflected in part in the diversity of this issue — amongst other features we have topics as distant from each other as single-species marine tanks and the world’s best aquascapes. 
I love seeing how new innovations push our hobby to new places, week in and week out, and I for one cannot wait to see what they bring us next.