I have observed that some businesses and groups, that sprung out of Academia, still heavily use MATLAB. I guess that's logical - as their users come from MATLAB-heavy environments.
But still, it kinda sucks because:
- MATLAB is still proprietary, and costs money
- The larger the codebase becomes, the more incentive there is to stick with MATLAB
- You somewhat limit yourself on potential candidates that can (or WANT) to work with MATLAB.
The only true benefits I see from using proprietary languages like MATLAB, would be very specific and optimized packages / libraries, along with good support...but then again, being dependent on vendors for updates is rarely a comfortable experience.