I recently joined the IT department of a big insurance company. Although the department\'s title is \"IT\", a lot of code gets written here; Java, JSP, JavaScript, COBOL and eve
Remember, there are plenty of version control systems that are absolutely free. And the amount of time spent installing and maintaining a version control system should be somewhere near 0 (they shouldn't require any maintenance). There isn't even a space penalty for most systems, as they can compress things internally.
You have listed some advantages, and there are others. But more importantly, I can't think of a single disadvantage.