Kevin, It works well for narrow rabbited parts and also useful when doing face mouldings with the feeder turned against the fence.
Cabinet doors are fairly easy to make and several methods are possible for all types shops. Sam certainly found a good way for his shop. We used to have dedicated shapers with the Weaver setup. Every job we do is different and most customers want something different than what is offered by mfgs. Our quick setup shapers work well for our work now. The local cabinet door mfg uses a variety of machines. A lot of dedicated shapers, some Unique machines, a big SCM double end machine for large orders and they just set up a CNC router for outside profiling and sizing of cabinet doors. They used a track fed SCM single end tenoner with jump copes for years but think they wore that machine out.