[harlequin2]

Horses for courses, as they say! I'm not fixated on one or the other and the reasons for using either IGBTs or FETs have been covered in these posts. I note that the LogiSystems 1000A controller that I started out with used IGBTs rated at 600V and had enough of them to carry about 2500A. But it still blew up, so poor design will be a much more important factor in the longevity of these things than device selection alone.
I think you will generally find that most designs up to 200V use FETs and above that IGBTs.
By the way, if you study the manufacturer's spec sheets, you find that not all IGBTs have a negative temp coefficient. Many of them are almost zero and some are slightly positive and you can parallel those ones very readily. IR have some good app notes on this. I read a lot of them while repairing the LogiSystms thing!