Poll: Would you like to try const-by-default or not?

[Jeff Nowakowski]

Jarrett Billingsley wrote:
> Please reply with your choice, and maybe a small explanation of why.

Option 2, and I'll quote Walter:

"Having const will reduce the problem by bringing the documentation into 
the semantic information of the code, and so reduce the need for code 
reviews in the future."

Functions with side-effects should be marked as such.  Let the compiler 
help.

-Jeff