The issue I have with that is the tooling you mention while stable and mature is actively being replaced by cloud tools because you really can't just debug a single machine in production when you have a cluster.. not to mention it is production so debug symbols might not even be available.
I understand your point of the maturity w/ tooling but I see it as a serious failure if you have to log into a machine in production and run gdb or IMO any tool. Your app can and should provide healthchecks/monitoring so that you can see if there is a problem (this includes even a thread stack dump).
I'm probably just biased and jaded as I have had some serious technical debt lost to Docker. It just feels like a VM on top of a VM on top of a VM of continuous things to break/learn... I want baremetal :)
