Aha!
Vagrant, Docker, Chef, Ansible, Fabric, Puppet, Jenkins, Octopus, TeamCity, Sentry, SVN, Git, AWS, Azure...
We all have monkeys on our backs. We all search for the best tools to use to make our lives easier and our products better and more reliable. When something new or improved comes out, we evaluate it, we weigh its use against everything from performance to code quality to backwards compatibility to having everyone learn yet another tool/library. If the benefits outweigh the drawbacks, then we make the switch. If not, then we leave our tool chain as it is.
Are there people who blindly switch to the Next Big Thing (tm) every 3 months? Yes. But I've found that in general they are few and far between. Perhaps you happen to work with one or more, but know that the entire web-dev community discourages that behavior.