If that’s really a concern, USB or PCIe NICs are always an option as a replacement, whether temporary or permanent. More advanced users can create virtual connections to route traffic through (macvlans) with custom configurable MAC addresses and/or use virtual machines that offer the same feature if a guest OS is preferred or necessary.

The identifier the article is talking about is instead persistent on any Windows OS regardless of hardware, including if the OS is a virtual machine. Using the OS at all on the Internet ensures Microsoft can always track it.