On 250mbit Cable, our limit is 1TB, and on 260mbit Fiber/whatever through the Telco, there is no limit. Even before 4k Netflix and other 4k, we'd hit the limit on the cable, and usually do another 7 or 800gb on the Fiber connex. One is for gaming, the other for home theater PCs/streaming/etc. It doesn't take much when you have lots of time on your hands, especially streaming 4k.