Yeah powershell is better 95% of the time. But that other 5% of the time you have to go back to CMD and redo what you were attempting. So the work done in powershell is a waste of time 5% of the time, and you still will need to know CMD to be able make everything work.
So Powershell is better in theory, but in actual practice I tend to do things in CMD because I know it will work.