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I'm not sure it really works like this. Suppose you've spent 10 years becoming a master java developer, and now all the investment is going into python. You're

I'm not sure it really works like this. Suppose you've spent 10 years becoming a master java developer, and now all the investment is going into python. You're going to better than the boot-campers after 1 week and a master developer after 3 months, whereas the others will still need years to catch up. I think it's worth keeping a loose working knowledge of all the mainstream software in your field, but don't really go deep until you need it.

redisman 5y ago
People who have only used one language way overestimate the importance of having a decade of experience in one language and way overestimate the amount of time it’ll take them to be production-ready productive in a new language. Syntax is easy and learning a new approach to language design is a great learning experience. You’ll still transfer most of the good parts over but you’ll also learn that maybe some things you’re used to can be made simpler.