As to the argument that nobody wants to "use" this stuff, I've never bought this. You can't expect users to come asking for tools they've never seen before -- that's rare. That doesn't mean they won't find those tools very useful if they were made available to them.
I think it goes even beyond that. The very fact that certain subsystem maintainers have found certain tracepoint suites already useful to themselves does not seem to carry any weight. A satisfactory burden/level of proof is not stated, just a counterfactual caricature "I don't think anyone needs this".
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