I read with interest on the blog which state whether FIRE is a fad. A fad is said to be an intense and widely shared enthusiasm for something, especially one which is short-lived. This is akin to the situation in which a new product is launched. The interest will be there due to the curiosity on the type of product. When a certain amount of time has passed, the interest will subside and all the things will return back to normal.
The only circumstance, in which the interest is ongoing, is limited to a few number of people with strong desire for the circumstance. It is very likely that such group of people is likely to achieve FIRE in time to come.