I depends on your individual needs. On my
TV, the NF app shows 15.6 Mbps when streaming UHD HDR content. Add to it a 2nd TV, using maybe another 10 Mbps for 1080p, intermittent use of phones,
tablets, sometimes simultaneous work for me and wife, downloading some heavy files and we easily max out our 500 Mbps connection.
Of course, you don't need it, but it's a nice luxury to have no bottleneck.
Those streaming cameras etc at the same time, will need higher bandwidth too.