That is a good point. I still argue you can do the same but with worse results with a torrent solution. If you have 2 minutes of buffer but realize you can't k

That is a good point. I still argue you can do the same but with worse results with a torrent solution. If you have 2 minutes of buffer but realize you can't keep it up you can still switch to a lower bitrate, that will allow you to get any missing chunks and maintain the buffer going forward. So you can still adapt (from the networks point of view much quicker than the 2 minutes), but not nearly as fast and the end result (quality change) might lag quite a bit.