Digital BW, The Print

As i'm still happy with my 2100/ut3D setup the following is right 
now mainly an academic question for myself, but nevertheless it 
intrigues me. I'm not sure if it has been discussed already, but a 
serach showed no reference to it.

Being an irregular visitor of this group only recently learned about 
Pauls new work on the 3MK setup for the 1800. An intriguing 
innovation, but it triggered immediately the link to Paul's earlier 
4K+ approach. So why not have the following setup:
- 2x MK
- 2x PK
- LK or LLK
- LM
- LC
- glop

This seems to me, at least theoretically, the best of both worlds: 
- use of standard, non-blended inks
- black only: cheap, undiluted ink, on matte paper 4 jets (2MK + 
2PK) firing in most of the density range to avoid banding (except 
for the deepast black, where PK is no dense enough)
- compatible with glossy papers
- ability to tone warm, cool and selenium

Am I overlooking something here?

Joost