While it's your opinion and also totally fine....
It's legacy because of the newer 7.1 Razer Surround software. But most of the people would have to request a new key for it and the legacy software has better hardware support.
And your device has to support Dolby Atmos....With the exception of headphones but this service costs $15 and has no benefits, so to speak. All in all, I prefer a fixed Razer Surround.