To extend, the answer is the BEAM itself. It ships with these tools built in.

From the whole zoo of system probing stuff or the downright amazing dynamic tracing.

Have a quick look at https://www.erlang-in-anger.com/

Which is also available in JVM and CLR, with amazing graphical tooling, which was the main focus from my question, hence the examples.

In my experience... Nope it is not really. Not to that extend. But sure i get you.

Great question, check out Erlang’s “Observer”, it’s incredibly powerful, one of my favorite parts of the BEAM :)

Thanks.