No one is telling you you have to learn how to use the version-control flavor of the week if your project doesn't currently use it and your project is serviced

No one is telling you you have to learn how to use the version-control flavor of the week if your project doesn't currently use it and your project is serviced just fine by some other version control flavor that everyone is already familiar with and is productive using. However, it's isn't very productive to have to deal with the same problems every day when using tool X, especially if taking a few hours to learn tool Y and switch to it would solve those problems.