You can, but I think the benefits are vastly overestimated. Languages are tools and the purpose of engineering is building, not having a tool fetish. This doesn

You can, but I think the benefits are vastly overestimated. Languages are tools and the purpose of engineering is building, not having a tool fetish. This doesn't mean one should use bad tools, but when learning new frameworks or languages I almost always feel like I am wasting time. The innovative ideas in programming language design are few and have been known for many years. Learning Ruby or Python instead of let's say Perl will bring you almost no benefits from a technical perspective. You're essentially paying with your time to enter the Ruby&Rails ecosystem of jobs, consulting gigs, events and so on but you're still building websites using the same protocols, servers, databases, etc.