"Root cause analysis" is pretty complex, and DNS + TCP + TLS are just a tiny bits of it (and they are one of the most reliable ones too, as those components are

"Root cause analysis" is pretty complex, and DNS + TCP + TLS are just a tiny bits of it (and they are one of the most reliable ones too, as those components are written once and then typically never touched). When I do root analysis, I look into internal logs, server metrics, recent source code changes, and related systems. I am sure this can be partially automated, but this is a lot of work. An API monitor that can only tell me "You have elevated first-byte latency and increased 5xx rate" is pretty useless, and I certainly don't think it can offer me any "plain-english suggestion" for this problem. What is it going to tell me, "git gud and fix your servers"?