That's just the thing. Why has there been so little adoption of commonly needed functionality as part of core, or at least as officially supported plugins?

Like, there's no official backup functionality? And why is version control not standard in 2018? This isn't something you just bolt on, or incorporate as a response to competing products.

I think they should abandon all hope of Jenkins being competitive. They should remain the weird old school universal tool it always was, and let it become relegated to legacy systems, like the Apache web server.

Jenkins was useful, but it's living in the past and trying to solve the wrong problems.