Is it worth learning Java in 2021?

Some reasons to show you why should consider learning Java now

In the IT world, where everything changes every day, is very often to be involved in discussions about which technology is better. One of the most common topics is related to programming languages, which one is newer, which one has better performance, why you would use that one and not that other, and so on. Has no sense to start enumerating all of them because nowadays, the startup ecosystem is so empowered that we can find in-house built-in programming languages targeting specific business needs (Like Clojure for fintech, bought by Nubank).

So, with all those languages coming up, developed in this modern era with big companies supporting them, why should we invest time learning Java, created almost 30 years ago?

Market presence

In most big companies, we will find some services built in Java. Very common to find scenarios where that old service (~10 years old) is being now migrated, the point here is that migration most of the time consist of architecture update, transforming from monolith to microservices, framework migration, or just language version updates, instead of replacing the entire project with a completely different platform.