At the moment, 1TB is par for the course among numerous US internet providers, and relatively roomy. About 99 percent of customers are on plans that meet their needs, Cox claims. The problem, as always, is that caps can easily be anti-competitive. Telecoms can use caps to steer heavy users toward conventional TV services, or exempt their own internet services to discourage you from using competing offerings. Also, there's the simple matter of future-proofing. A 1TB cap seems like a lot now, but it could be a problem a few years from now when you're regularly streaming 4K video, downloading extra-large games or backing up your entire PC.