The point of NGTC isn't that its cheaper to build, its that its meant to be cheaper to maintain and run the cars because of the shared parts.
Running an old S2000 car is of course going to be cheaper than building a new NGTC car from scratch. That would be the case for any new spec of car - you can't avoid that.
The point is to make running, repairing and maintaining the cars cheaper, not making the initial builds cheaper.
NGTC wasn't so much dropped in STCC more like STCC completely dissolved into TTA. STCC before that was barely existing at all, the series was just not in a state for switching to new regulations and building new cars. I don't really see any point in emphasising it - "even STCC dropped NGTC" - STCC had bigger problems.
That's just not happening with any new regulations, and that worries me. If one set of regulations has a slight dip in popularity one year, it could kill the series. That's why I thought this could be a fatal move by the FIA for creating their own rules instead of choosing NGTC, which is cheaper, already proven popular and has a wide range of cars already running. I'm going to be honest here and say if these new regulations don't provide some serious interest, I can't see WTCC continuing for much longer.
Why should the FIA choose to mandate NGTC for the WTCC? Its struggling to entice manufacturers to the series as is and there are struggling independent teams, I'm not sure WTCC could survive a major regulation change in its current state.
BTCC was in good health 2009/2010, so it was possible to start switching as it turned out some independent teams could fund the engines and then later new builds of cars.
WTCC isn't in this position.
But even so, I don't think its right to be doom and gloom for WTCC? Citroen is on the scene, so are Honda and Lada and RML are still building Chevies.
Oh noes, BMW and SEAT aren't building anything, thats not the death of the series.
While NGTC has been great for the BTCC, it wouldn't necessarily be great for everyone. Again, the WTCC has different issues to contend with, the biggest one being its struggle for image (being the least prestigious of the FIA World championships) and the large cost involved in travelling all over the world for race meetings.
The costs are already a lot higher just to take part, never mind adding the cost of building new cars.