I see a drop in groups like the American Cichlid Association, a drop in Cichlid News circulation, and larger than that - what you see. Oscars are cool, but too large for most people. Convicts are cheap, but destructive. Where is all the diversity I would see in local shops? My local in Montreal had 8 banks of 18 tanks. There were 2 full banks devoted to Cichlids - one to mbuna and Tangas, and one to South American and the odd African river ones. Usually, there were many varieties of domestic angels and a few Apistos mixed in the tetra section.
The last time I dropped by, a few weeks ago when I was on the road, they had 3/4 of a bank of Rift Cichlids, and barely any SA Cichlids. The space was taken by interesting Asian imports.
The store here in my new town doesn't sell any SA Cichlids, and has one mixed tank of mbuna. It isn't a bad store - the fish are healthy and the Asian, nano-fish are cool. This isn't a knock on Asian fish, which can be fascinating and often thrive in smaller tanks.
People often can't afford the space for dwarf Cichlids. Housing costs have skyrocketed, and wages haven't. Small tanks rule, and fish that need space are cut out. Oscars, severum and the lab-rat parrots are everywhere, but you really have to look for the less known stuff. I know importers who have stopped bringing in non predatory Cichlids, because no one buys them, and they are a loss. That's a shame - at a time when species are being discovered at a great rate, they aren't entering the hobby because there isn't enough curiosity, and there aren't enough resources to keep even the easy ones.
I will never be primarily a Cichlid guy, but they are among the most fascinating fish to watch. I have seen amazing Cichlid behaviour, more than any other fish group. It appears economics and the times have really undercut the Cichlid Hobby though. It has become something of the past in many regions.
I'm no different. I now have breeder pairs of 4 dwarf Cichlids, one lone male Nanacara adoketa, and that's it. I once had 15 Apistogramma species here, but since I use some species to pay for my costs, Cichlid info doesn't sell anymore and those resources go elsewhere.