[hadlock]

Github being a single pane of glass for developers with a single login is pretty powerful. Github hosting the runners is also pretty useful, ask anyone who has had to actually manage/scale them what their opinion is about Jenkins is. Being a "Jenkins Farmer" is a thankless job that means a lot of on-call work to fix the build system in the middle of the night at 2am on a Sunday. Paying a small monthly fee is absolutely worth it to rescue the morale of your infra/platform/devops/sre team.

Nothing kills morale faster than wrenching on the unreliable piece of infrastructure everyone hates. Every time I see an alert in slack github is having issues with actions (again) all I think is, "I'm glad that isn't me" and go about my day

[bigstrat2003]

I run Jenkins (have done so at multiple jobs) and it's totally fine. Jenkins, like other super customizable systems, is as reliable or crappy as you make it. It's decent out of the box, but if you load it down with a billion plugins and whatnot then yeah it's going to be a nightmare to maintain. It all comes down to whether you've done a good job setting it up, IMO.

[hadlock]

Lots of systems are "fine" until they aren't. As you pointed out, Jenkins being super-customizable means it isn't strongly opinionated, and there is plenty of opportunity for a well-meaning developer to add several foot-guns, doing some simple point and click in the GUI. Or the worst case scenario: cleaning up someone elses' Jenkins mess after they leave the company.

Contrast with a declarative system like github actions: "I would like an immutable environment like this, and then perform X actions and send the logs/report back to the centralized single pane of glass in github". Google's "cloud run" product is pretty good in this regard as well. Sure, developers can add foot guns to your GHA/Cloud Run workflow, but since it is inherently git-tracked, you can simply revert those atomically.

I used Jenkins for 5-7 years across several jobs and I don't miss it at all.