The thing is, a Jet is a Jet. TPs are nice, and if I had £1000,000 to spend on an aeroplane, then I'd get a Beach Duke with Royal Turbine conversion. (about $1,200,000 for the converstion, + $400,000 for the Duke).
The true operating costs of the D Jet are meant to be in the region of $400 per hour. Now compare that to a similar costing Citation (in other words reasonably old) which burns $20,000 worth of fuel just to cross the USA and has a pretty small range.
Speaking pf crappy plastioc aeroplanes....isn't the A380 and 787 mostly made of crappy plastic
(not to mention White Knight and Space Ship 1 come to think of it).