[di4na]

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/

[pjmlp]

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

[di4na]

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