I have move from Perl around 2 years ago. My team working hard with 
Groovy 14 months ago. I myself focus on Ruby.

In dev mode I need to restart when I make change to config folder and 
plugin in vendor. Other files are not need restart. But sometime Strange 
behavior make me restart. Not offense just a few time a month. Groovy 
almost the same.

I prefer ruby because it no need JVM. I can deploy it on most platform. 
If Java ecosystem is target I can deploy it in JAR/WAR

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