What are you talking about, man? Mathematica has no package for creating digital filters. If I'm wrong, prove it.
Okay, I'll concede this one.
There are various mechanisms to make MATLAB talk to Mathematica, but that doesn't change the fact that, in isolation, Mathematica has nothing even resembling Simulink.
You know what, Crosson? You have no idea what you're talking about. Why are you arguing this? You apparently know far too little about MATLAB to give it any fair comparison. GUIDE is MATLAB's graphical GUI development environment. It requires no C++, nor any kind of hand-coding.
The lack of competent GUI tools in Mathematica is a major handicap, and it always has been. I'm happy to see that Wolfram has decided to stop trying to sell the world on his deranged cellular automata obsession, and has instead decided to improve his software.
Are you actually rescinding your statement that Mathematica can do everything MATLAB can do? Or are you just being cheeky?