I wouldn't be that critical. As a long-time but now somewhat infrequent Mathematica user (from the times it ran on the NeXT) I'm happy to see alternatives, even

I wouldn't be that critical. As a long-time but now somewhat infrequent Mathematica user (from the times it ran on the NeXT) I'm happy to see alternatives, even if they didn't benefit from Wolfram's almost maniacal drive for feature coverage.