why do you not want a switch? it’s not like anything needs to be configured for basic home use, just plug it all in to something unmanaged.

it depends on usage patterns honestly. You didn’t mention any single activity that would really struggle on a 70/70 Internet connection. The issues would start when you run 3 Netflix streams and a zoom call while patching your game library. 4k Netflix is about 25 mbps on average.