Seems that RNDIS on Linux is deprecated as it's deemed insecure, so I need to use CDC-ECM for Linux (which works), but there's no generic driver for that in Windows (unless anyone knows differently?).
So I am still trying to get RNDIS working...2 days of prodding and poking so far and no luck :( Can anyone confirm that they have actually had RNDIS working to a Windows 10 or 11 machine recently? With Nuttx 11 or 12 maybe? And, if so, share a working .config with me?