I would bet that using simple cope & stick joinery is very common practice. Best I can tell all the cabinets I have paid attention to lately seem to be made that way, including the ones in my own house. They seem to be quite solid, and are holding up just fine even with solid wood raised panels. Of course, it's not nearly as strong as a mortise & tenon joint.
If you want to do M&T, then you just use the "stick" part of the C&S set. Cut an offset shoulder on the tenon (rails) on your table saw, and also chisel away the front part of the inner decorative profile on the stile part. Pare a 45° miter on the inner profiled part of both the rail and stile.
Alternatively, it's much simpler if you don't want an inner decorative profile on your rails & stiles. Just a plain square profile on the rails & stiles looks nice IMHO. In fact, you could do it all (except the mortising) on your table saw -- you just have to use a haunched tenon to fit the mortise properly.