50 seaters are done...all the orders are for 70+.

RJ's are disposable and will be wearing out in droves over the next ten years. Since fuel cost is such an issue with RJ's, it makes sense to buy new technology with lower fuel burn, if you can afford to.

If you can't afford new airplanes, you'll either have to fly new airplanes which mainline provides or, more likely, go out of business.