I can't tell: are you saying that using Jenkins results in the simplified stack you prefer? If so, I don't agree; I think Jenkins is a very un-simple way to run from jobs.

When I say simplified stack I mean fewer tools that must be learned and managed by people. Jenkins simplifies in that way.

Interesting. I still don't see it that way. It seems less like a single tool when used in this way than multiple tools running alongside one another. Different strokes for different folks I suppose!