You can easily use a script to check any new source changes and tabdiff plugin in order to open every file in a tab. This will allow you to see all the changes, very easily with one command.
It's practically vim, this means that the whole interface is mouse-free, this increases development speed significantly since you are only using the keyboard.
Since this is basically a vim feature, it's clear that people who aren't used to vim and its keyboard-based interface would find it very hard to work with vimdiff.