for what its worth airbyte's connectors themselves are MIT https://airbyte.com/blog/a-new-license-to-future-proof-the-commoditization-of-data-integration https:

for what its worth airbyte's connectors themselves are MIT https://airbyte.com/blog/a-new-license-to-future-proof-the-commoditization-of-data-integration https://airbyte.com/blog/a-new-license-to-future-proof-the-c... arguably this is "much of it" rather than ELv2