Tangentially related, I just recently found out that Lumberyard actually was spun out[1] into the open source Open 3D Engine[2] under the stewardship of the Linux Foundation. It's a nice surprise to see that Lumberyard didn't just die out, and is joining the ranks of open-source engines.

[1]: https://web.archive.org/web/20220614090421/https://aws.amazo...

[2]: https://o3de.org/