> Community Notes wouldn’t have happened without X.

Community Notes did happen without X. It was a feature introduced in January 2021 under the name Birdwatch.

https://blog.x.com/en_us/topics/product/2021/introducing-bir...

Twitter’s acquisition only started over a year later.

https://en.wikipedia.org/wiki/Acquisition_of_Twitter_by_Elon...

Community notes was built by Twitter, before the purchase.