Down sides

• Scripts have a few problems.
• They can be slow.
• They tend to be rather small. This means they don't have the support that larger languages have. (IDE, manuals, books, libraries, etc.)
• There are another set of resources that may seem less obvious, compilers, support on different platforms, and support for handshaking with other languages.
• It also means that there aren't experts around to help you.
• However, some scripting languages are pretty popular.