So with your system, how do you view the changes between one version and another? It's possible to view changes within a single file with diff, but what if you want to see the entire set of changes, e.g. in look for a regression?
What if you're working on an experimental feature that makes your program unstable while it's still being developed, and the feature spans multiple files? If you decide later on that the feature is useless, do you modify each of those files to remove all the #ifdefs? I make a temporary branch for this and delete the branch if I decide it's a failure.
What if you're working on an experimental feature that makes your program unstable while it's still being developed, and the feature spans multiple files? If you decide later on that the feature is useless, do you modify each of those files to remove all the #ifdefs? I make a temporary branch for this and delete the branch if I decide it's a failure.