I sort of use SAS sometimes. There are definite downsides, like the UI/IDE is an abomination from the 1980s. And anything except the most straight forward of code is impossible to read (and many other things). However, in terms of being fast and being and all-in-one language+data solution (meaning no calls to a seperate database solution) it has something to say for it.

But yeah, I sort of hate it. If it had modern syntax and data structures and UI it might not be bad.