[vorg]

> go to the JVM with something like Grails framework

No-one's upgrading from Grails version 2 to version 3, or starting new projects in it any more.

Apache Groovy's good for scripting on the JVM -- just don't build any systems with it. Systems on the JVM should be built in languages that were statically typed from the ground up, like Java, Kotlin and Scala. Static typing was grafted on to Groovy in version 2, and not used very much, hence no-one's sure about its quality. Best use Groovy for glue code and build scripts only, which was its original purpose back in 2003.

> The skill level of Python and Java/Groovy developers tends to be higher than PHP

Now this is starting to look like an advert for Groovy, assuming all Java programmers also use Groovy, and associating it with Python in contrast to PHP.