I don’t believe that’s true. Go is a good example of a non-FP language that works well for concurrent programming. It’s sort of OO with its interfaces feature.

For the vast majority of applications that are written today, concurrency is simply not necessary. Yes, this means that they aren’t exploiting maximum multi-core efficiency, but in the real world of IT, that often doesn’t matter. There are many other pragmatic factors that determine what technology is best used for a given project.

In other words, use the best tool for the job. That tool can be OOP in many instances. That tool can be FP for concurrent situations. FP is not a programming panacea. It is not the universal programming tool.

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