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Or you, just get to used to heterogeneous monitoring tools like DataDog and Prometheus.

Prometheus is great, but it won't tell me why that container gets "no route to host" when taking to that service. That's when I need a shell for running traceroute, tcpdump etc.

That was just a possible example.

If you want a shell, that is what stuff like JMX, or server side REPLs are for.

"Lisp at NASA: using a REPL to debug Deep Space 1 while it was 100 million miles away"

http://www.flownet.com/gat/jpl-lisp.html

Haven't you heard? Devs aren't going to need us any more. They've been telling us that since the 70's, at least!

change? hate it.