To be fair, they have a very long history of open-sourcing internal software, and it becoming industry standards, this is not at all new, as some have been saying.

Especially so in database technology: rocksdb, zstd compression, presto, Cassandra, Hive, Velox (this one’s new) are all Meta’s doing.

And those are just the popular ones, there’s way more (database-related) projects they open sourced that didn’t get too popular!

So all in all, as much as I’m happy to complain about them as a company, they’ve always been huge contributors to the open-source ecosystem.