popular because they can work with much less compute for instance in order to generate a 1 megapixel image for an auto regressive model or even a Leighton space our aggressive model you need to use at least 512 course or TPU to do that because you need such large pad sizes whereas for gans you can make it work with a single V 100 GPU and then so there so that's that's one reason why gangs are clearly preferred over than 10 C models because I'm amount of time taking the train as a sample and you can also see better interpolations and