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

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?