Comment by martinald

I disagree - video conferencing and screensharing with a couple of calls at once will quickly eat up 10-20mbit/sec. 50-100mbit/sec I would agree is enough.

Regardless you're missing the point. DOCSIS has maybe 100-200mbit/sec of upstream shared between hundreds of homes - this will vary depending on config, and keep in mind a lot of that will be used for TCP ACKs from the downstream. So you probably have say 50-100mbit/sec "real" upstream available, or less than 1mbit/sec per subscriber.

If you hammered 40mbit/sec hard you are using nearly the entire 'usable' upstream of your entire cable modem segment.

DOCSIS is just massively inferior to FTTH for this reason.