It’s the size of the amp which makes it difficult apparently, squeezing it all into the small RM casing. Plus as Mark pointed out they have the ABM series with a valve front end (not quite what I am after but it’s there), and then the OriginAL pedal which you could hook up to a lightweight power amp if you so desire. They just feel their product range doesn’t need more in it at the moment which is fair enough. Wrong, but fair enough hahahaha 😜