If you ever needed a reason to break out of your current programer shell and learn a new language. Check out this quote from Bjarne Stroustrup the creator of C++.
Successful software is long-lived; life-spans of decades are not uncommon. A good application/program often outlives the hardware it was designed for, the operating system it was written for, the data base system it initially used, etc. Often, a good piece of software outlives the companies that supplied the basic technologies used to build it. -- Bjarne Stroustrup