In theory, it can be a productivity enhancer, if you're comparing it to absolutely nothing. However, if you compare it to, honestly, post-it's on a whiteboard

In theory, it can be a productivity enhancer, if you're comparing it to absolutely nothing. However, if you compare it to, honestly, post-it's on a whiteboard that are halfway organized, or a plain txt file that all the people can get to (if it's a remote company), then frankly it's almost always a productivity suck.