IMHO we are more likely to see the TW killed off because of emissions regs. The Suzuki Van Van has fuel injection. (the closest competitor to the TW).
I second. They will either need to update the TW in the next couple of years with EFI, or kill the line.
I do some work on small engines (chainsaws, etc), and I recently had the regional Stihl rep stop by to give a little refresher training. You should see the stuff they'll have out soon to meet EPA and Euro emissions regs. Eventually, even chainsaws, and your home lawn mower will be forced into electronic fuel management. Soon, the days of a $200 lawnmower from box store will be gone. Again, it's the regs, not the market.
Costs mean nothing to the regulators, in fact they higher the better to them, because some people will just stop buying and using, which is their ultimate goal anyway. Okay, sorry for the rant, but it is the future...pay or stop using it.