He writes: “Folks at Twitter past and present are strong and resilient. They will always find a way no matter how difficult the moment. I realize many are angry with me. I own the responsibility for why everyone is in this situation: I grew the company size too quickly. I apologize for that.
He adds: “I am grateful for, and love, everyone who has ever worked on Twitter. I don’t expect that to be mutual in this moment…or ever…and I understand.”
I don't think Jack Dorsey grew the company too quickly. He just let the company size get out of control when it hit the mainstream around 2008/09.