The home upgrade that most folks need is a symmetrical fibre optic of some kind, with open-access [1] and either municipal [2] or non-profit at OSI Layer 1/2, with competition at OSI Layer 3. I think at this point 100Mbps would be the minimum, with diminishing returns once you start getting above 1Gbps (but available with XG(S)-PON(G.98(0)7)/NG-PON2(G.989)/HSP(G.9804) and 802.3ca). It was technically possible to wire…
The internet is designed for average people to suck down content, rather than create content. It's why I get 1gbps down but 35mbps up.
If you told people about streaming >1080p video folks with 9600bps modems back in the day would have thought you were nuts. Certainly there's probably a point of diminishing returns, but why not give as many people 'too much' bandwidth and see if folks think of creative ways to use it?