Usability. Just recently I went down a particularly deep rabbit hole when I tried to run Angular unit tests with a headless Chromium browser on a Jenkins CI server.

Suddenly I found myself having to debug various Docker images, Jenkins files and Kubernetes pods.

Not only are these tools often used indiscriminately, regardless of whether they're actually needed for the use case at hand but there frequently also seems to be an apparent disregard for the non-functional requirements of the people using them.

Sure, I can launch "kubectl" or "docker exec -it" to see what's going on but as someone who merely wants to run unit tests I shouldn't have to.