Seems pretty obvious to me. Removing cmd would be pointless, would free practially zero resources, and will introduce an huge amount of incompatibilities Even many simple programs launched from cmd today will trow in error in case of troubles, but will stay silent if launched by powershell. Having PS 100% compatible to cmd is still a mirage.
@T-S yep I agree and I don't know because but I never like to use PS for some reason maybe your GUI is very strange sometimes NO understandable so using CMD is better at least for me