One of my personal opinions on this is:

• No matter if they exist, this debate is tiring because most teams would rather need a 5th Junior person doing quantitative stuff
• This debate underminds how insane the progress of two good engineers can be if they have the freedom to bounce ideas between them.
• And this "10x" debate seems to overrate coders that are genuinely just good slightly over average but again worse than hiring two people.
• Founders who can't code or recruiters have no effing idea who "10x" engineers really are. They're wasting money on the wrong people because of this debate