If someone tells me to try out a new language I generally give it about 10-15 minutes. If I'm not running hello world by then I'm not interested in something I'd be taking a casual interest in. The only time I'm giving it more than 15 minutes is when I have a real business need for it or want to enhance my resume with something that has a lot of businesses seeking that skill. Python, for example, I was easily able to get up and running in under 15 minutes with a hello world and now I use it regularly for lots of little tasks. I can't be fussed to toy around something that takes too much work/infrastructure to get up and running. There's other options out there I can be more productive in faster.