Well, you say > Saying that DevOps tooling changes every year is absolute nonsense. And then you list 5 technologies with an alleged lifespan of half a decade

Well, you say > Saying that DevOps tooling changes every year is absolute nonsense. And then you list 5 technologies with an alleged lifespan of half a decade, which sort of hints at the idea that someone would need to learn/update a new tooling skillset once a year. In that light, GP's comment doesn't sound so wild.