Netflix uses Java – 2026 Edition [video]
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Java is reliable, it's memory safe, it's mature, the tooling (IntelliJ and Eclipse) do not have competitors in other languages, the debugger is top notch, JFR is a lifeline, but most importantly the JVM is instrument-able. Something like jolokia agent+telegraf will get you a ton of vision into your production environment with zero changes to your codebase.
Java and the JVM are the best for so many reasons.