What the reasons for/against returning 0 from main in ISO C++?

Question

I know that the C++ standard says that return 0 is inserted at the end of main() if no return statement is given; however, I often see recently-wri

Answer 1

Because some people don't know. Not necessarily the people who wrote that code (although that's also possible), but some people out there. Explicitly writing return 0; is being nice to them.

Also, as a convention it makes the language more uniform, which aesthetically is important to at least me.