Ethernet provides a much more stable and consistent connection. WiFi can be affected by so Amy things: electric appliances, building constructed materials, etc. wifi is great when away from a desk, it provides freedom of movement, but when at a desk and doing real work, Ethernet is a much better option.I deal with 1gb plus files often over wifi withour issues. The whole studio runs on the cloud.
You must be dealing with much bigger files than this to really need Ethernet. You haven’t told us what though.
I am not saying that Apple should take anything away from you. They should give you gigabit wifi the way you need it, but they should also provide an Ethernet port for people like myself who benefit from it. Thst way you and I can both have what we need and we can both be happy.