What I'm trying to say is, if this comes out of the box and works reliably, then it'll attract more developers given the other ease of deployment aspects of Go.
https://netbeans.org/images_www/screenshots/platform/jmonkey...
https://netbeans.org/images_www/screenshots/platform/nbAWSAd...
https://netbeans.org/images_www/screenshots/platform/lg_soft...
https://netbeans.org/images_www/screenshots/platform/GGSSEph...
https://netbeans.org/images_www/screenshots/platform/platypu...
https://netbeans.org/images_www/screenshots/platform/blueMar...
or the new Java crap like
http://fxexperience.com/wp-content/uploads/2011/05/Charts-Ba...
http://docs.oracle.com/javafx/2/best_practices/img/saleshist...
https://blog.idrsolutions.com/wp-content/uploads/2014/03/vie...
??
The newer bundled jvisualvm also looks fine: https://www.dropbox.com/s/549exowkau3ry3t/jvisualvm.png?dl=0
You mean apart from Tcl, Python, Java, Factor, just about every Smalltalk apart from GNU Smalltalk, Racket, possibly Ruby…
No, there really aren't that many. Even fewer that are "professionally" usable. (I am not committing to Go's toolkit joining that latter set as I've not yet seen or used it.)