Yep, multiple HD streams going at once in our house is an issue. Also, 4K and its successor are coming soon. Data caps are being implemented in a lot of areas. There's no free lunches in media consumption. Eventually, costs are going to rise a good bit on streaming if everyone transitions over to that. For most of my customers, that issue is related to the throughput limitations of the AP not the bandwidth of their ISP. Of course, I have zero knowledge of your set up, so I'll just say this as a general comment. To fix that streaming issue of 2 to 3 people seeming to max out the ability to stream, I usually install a couple of access points to distribute the traffic over multiple devices. My AP of choice right now for consumers is Ubiquiti's Unifi APs. They run about $70/AP, you can set up the same SSID throughout the house on different APs and it will hand off from 1 AP to the next as you move through. By splitting up the traffic like this, it has fixed that issue for all but one of the people I work with and that guy had a router that was causing his issue. Side note, if you go this route, creating multiple SSIDs (like enabling the guest network feature) forces the AP to split itself in to multiple virtual APs which reduces the throughput by about 65% for any one SSID network.