The article is effectively an advertisement.

The yield of this wheat is 1.5 (Miracle Wheat) vs 5.8 (Standard) tonnes/hectare. That's about 25%. Since wheat can easily be stored for many years, you would have to have droughts in 3/4 of years before you break even due to drought resistance. In the meantime farmers can barely break even financially growing this stuff.

*HOWEVER* Miracle Wheat is very very susceptible to lodging (falling over and dying in the rain). So in years where there isn't a drought you would sometimes lose almost 100% of the crop. So even if there were droughts 3/4 of the time, you would still never break even.