I have replaced so many hard drives with solid state drives when the complaint is slow computer. the latency is noticeably slowing down windows and chrome, but the drive is still in good shape. So yeah, there is reason to believe that many people out there buy cheap stuff only for them to need to upgrade for more money in the near future or they live with the slow unfit for the task hardware.

Yeah, it is bad practice to use up bandwitdh with unneeded downloads when the user is there for short periods or watches small parts or one time. There are plenty of users on pay as you go plans or their infrastructure is slow and limited capacity that we call metered lines. These metered lines can be a last resort reduncy line for network stability. I have seen clients add a wireless line that is cheap to keep active, but they pay for the amount of data used.

I think the end of buffering the whole large content stream is a good thing. I believe you can add an extension to Firefox that allows for video content to be fully buffered if you want to.