Is it useful to have a CLA when you e.g. use an MIT license for your project? I am just asking this, because when you use the MIT license you are already granted to sublicense it, so is a CLA necessary and/or useful in this case?
Is not a CLA only useful when you use copyleft licenses such as the GPL, because the MIT license can be changed anyway?
Note that I do not want to have a list of advantages or disadvantages. I only want to know whether it makes sense in this particular case.