Remember that essentially every kid in Europe is home from school right now.
> Netflix already downgrades when bandwidth is limited.
It downgrades when bandwidth constraints and congestion start bothering _it_. By the time all the Netflixes which are competing with you do so, your Zoom conference will be long gone. Netflix is quite tolerant of an unreliable network. Many work-from-home things, VC in particular, less so.
Re second point: you are misquoting, and making a point that is obvious. The next sentence is "The smart move would be to tell Netflix to downgrade more aggressively" to help your canonical zoom conference (which is a super poor example - apparently Zoom failure is due to Zoom and not network capacity).