I have said before, this statement you keep on making is total Bs, if a VFD Drive is correctly installed there is no EMI noise that will affect a USB connection.
Controls are not immune to EMI interference. not very often, the connection is at fault, even though it appears to be.
An Ethernet connection is more immune to noise than a USB connection, that's just by design. Ethernet was the next step up for the Hobby world, USB is still a major player in the Hobby world, even though there are not many control options, that have a USB connection.
Ethernet connected controller's are everywhere, USB connected controller, there are not very many, so the Choice is very easy, for a new build.