Let's not forget most of the good JVM tooling, especially early on in Java's history, was and is 3rd party and most cost money. Even today, it's still a sea of confusion, especially if you are new to all of this. For example if I search for "best JVM profiler", I get a list of 10 results all claiming some form or fashion of being "the best" or "most popular"

As someone who spent the first half of their career on the JVM and now is mostly Go, I don't understand how someone who has been on the JVM most their life can say Go's tooling is "the worst" Most of the things you have to configure and tweak on the JVM and profile for aren't even considerations in Go, because they are either simply non-issues in Go, or don't exist (because Go does not have a virtual machine to begin with)