I think having a cross country cruise speed that gets you places reasonably while still having STOL capabilities to go in and out of short strips, haul a reasonable load, be relatively inexpensive to own and operate, and yet be able to be a good ski plane, a float plane, a tri gear or a taildragger, or a fun sport aerobatic plane with wings that fold for storage is a pretty large list of capabilities. I'm not sure there are any other designs that can claim all that.
But I agree, if speed is the major goal a Kitfox is not the airplane. I like the balance of all things listed above. Otherwise I'd be flying a Glasair 3 with 350 hp and twin turbo's to get me where I need to go.
But that wouldn't be half the fun as getting there in the Kitfox