Fran, it's fairly obvious you haven't been to a rave, lately

Modern dance clubs don't do separate songs, everything sort of flows together, tunes (or at least beats) can go on for hours, almost! Trance and techno musics kind of self-explain themselves (at least, trance!). The whole idea is to keep a hypnotic beat going while other elements swirl around and change within the beat. It's about as far from a traditional 'gig' as you can possibly get, and needs musical tools that are definitely different from traditional arrangers.

Unfortunately, VERY few arranger manufacturers are willing to add the really simple changes to their OS's that WOULD make them usable for modern musics (and vastly increase their sales!), so workstations still prevail in this world. Shame, really, as there are MANY things about arranger operation that WOULD be great for trance, techno and hiphop production. But while they are still being aimed squarely at the older crowd (and attrition will gradually reduce that market), they will continue to languish, slowly.

Not good for us, not good for the arranger divisions. Sooner or later, some kind of convergence HAS to happen, or workstations with limited arranger functions will gradually take over (although, by then it will probably be a laptop and a controller!)