Cooking temperatures with non-stick cookwear I'm looking at replacing most of my cookware, since it's beginning to show signs of wear. A lot of what I've been looking at is various brands of non-stick options. However, I've noticed a trend. The descriptions say to avoid cooking above medium heat. Most of the time, I do cook at medium to medium high heat, but I do cook higher when I'm doing things like boiling water.

Is medium heat sufficient to boil a water in 3-5 qt pans? I also tend to stir fry at medium-high to high heat. I've done this for both gas and electric (currently have electric) stoves.

Should I have non-stick options (like a non-stick wok for stir fry and a non-stick pot for boiling water) or am I just doing it wrong and I should be cooking more at medium or maybe medium-high heat and almost never using high heat?
The temperature guidelines are for frying and can be completely ignored if boiling. Being full of water is a very effective way to limit the maximum temperature of a vessel. You'd avoid boiling dry in any container.

To be honest, the guidelines are essentially nonsense for any use. "Medium" varies too much between stoves and burners. For example with my large non stick pan, medium on the big burner would be only for very fast frying while medium on the middle size burner would be very gentle.