Whether the version is overkill depends on the frequency of version changes. If you're doing careful corporate releases with staging and QA on a two-month basis

Whether the version is overkill depends on the frequency of version changes. If you're doing careful corporate releases with staging and QA on a two-month basis, it's definitely overkill - if you're doing continuous deployment with several releases daily and different systems running different versions concurrently, it's probably valuable.