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There are entire product categories (Games / Databases / Operating Systems / Video editors / Animation / Data analysis tools / robotics) where C/C++ continue to be the dominant languages.

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Thanks for the info, but I'm not sure databases belongs in that list. I work on a database system (Couchbase), and our codebase is pretty mixed. The oldest part of the system, the Key-Value storage engine, is C++, but the newer parts are a mix of Erlang, Golang, and Java.

Anyone know what some of the newer systems, like Spark and Snowflake are written in?

Spark is mostly written in Scala.

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