Why STL containers are preferred over MFC containers?

Question

Previously, I used to use MFC collection classes such CArray and CMap. After a while I switched to STL containers and have been using them for a while.

Answer 1

• Compatibility with other libraries (such as boost) in syntax, interoperability, and paradigm. It's a non-trivial benefit.
• Using STL will develop a skillset that is more likely to be useful in other contexts. MFC isn't so widely used any more; STL is.
• Using STL will develop a mindset that you may (or may not) find useful in code you write yourself.

Using something other than STL isn't inherently wrong though.