Am I the only one who finds it ironic that the development teams behind the top two open source editors introduce support for collaborative editing on the dame day, apparently unaware that they were both working on the same thing, and there being no evidence of collaboration between the two?
On-topic, I remember recently Uber and Lyft were working on a similar feature, and both knew about the other but neither knew that the other knew. I wish I could remember what the feature was.