Earlier quoted context omitted.
Comfy was created because we used environment variables on multiple servers, for many environments (prod, staging, demo, dev, etc), deployed by a few developers. The purpose of the tool is to help developers share their config and keep sync with the rest of the team. But I agree, if it's overkill if you don't need it!
Can you give an example of such an environment variable?
Two days after, developer B deploys its version, but isn't aware that A deployed with the new feature enabled, so the feature is disabled with its deployment on integration.
Ideally, developers should use a centralized configuration management to no suppress each other configs. That's why we use Jenkins or the Atlassian suite for example. But it's heavy to install and maintain sometimes.