This has been my observation as well - projects flourish under the Apache umbrella. Parquet and Arrow are also widely used and will probably continue gaining i

This has been my observation as well - projects flourish under the Apache umbrella. Parquet and Arrow are also widely used and will probably continue gaining importance. A Rust big data engine, similar to Apache Spark, was just donated to the Apache Arrow project (it's called DataFusion: https://github.com/andygrove/datafusion https://github.com/andygrove/datafusion). From what I can tell, Apache already has a lot of important projects and is adding new ones that will continue to grow.