Unity owned ECS patent uses techniques described in 2013 Stack Exchange post

The 2013 StackExchange post [^{1] describes what is now commonly called an "archetype" based ECS architecture that was implemented as compile time archetypes in the author's open source project in Feb 2018 [}3]. A similar ECS model was described later in the June 2018 patent filed by Unity ^2 and active since 2020.

It's useful to bring visibility to the issue for the inevitable patent trolling that will occur in the future.

References: [^1]: https://gamedev.stackexchange.com/questions/58693/grouping-entities-of-the-same-component-set-into-linear-memory/