Can or does MS use HWID for other uses? If a W10 user was using Tor or VPN, for whatever purpose, could the HWID easily defeat them?
Doubt that it can or would be used for such.....But as with anything else if you are on VPN and log into a MS account or any other account.....They know who you are as you identified yourself at that point. Multiple people are using the same IP on VPN and the traffic is encrypted so they should not be able to read data from the connection when you are connected to someone else.