I was happy to see the D415 seems to work of USB 2.0 HS. Am I missing out on anything by not running it at USB 3.0SS. Like framerate is lower or anything like that? It seems to work happily on my android platform so far.
Resolution and FPS modes are much more limited on USB 2.0 than they are on USB 3.0, which has many modes supported. The guide to connecting the 400 Series cameras to USB 2 on Raspberry Pi 3 gives an idea of what to expect on a USB 2 connection.