I have never had a problem cooking rice. Uncle Ben's, Carolina, Goya, sticky or parboiled, short grain medium grain long grain, just never had a problem. There is a ratio of water to grain, simmer time, lid on etc.
I have never had a probelm cooking rice until ... last night. Was making a paella, and used a good quality organic rice, long grain, (20 min) but...even an hour later the rice was part mush part crunch...what a disappointment.
This was a major organic food producer, sealed bag, no damage visible, not a bulk item. And I have used this brand before with good results making regular boiled rice.
The recipe I use is TNT and have been making it for years. I was not suddenly at high altitude, although my blood presure may have spiked. THe only difference was I had this rice which was good to use once before adn I grabbed it and ... not good. Next time...Uncle Ben's. There is a reason for certain processes...regularity, uniformity, guaranteed results.