I could have been more clear there, "PM" has many different meanings these days. I've never been on a team using scrum that didn't have a project manager or pr

I could have been more clear there, "PM" has many different meanings these days. I've never been on a team using scrum that didn't have a project manager or product manager as part of scrum (or both). Most often they have been my scrum leader. Scrum is supposed to be self-guided, but I have never seen it implemented on a team of any scale. I also wouldn't expect a team without PMs, whether that's project managers or product managers, to be very effective. Someone needs to be focused on keeping the project moving, and often the skills needed for a scrum leader/master overlap greatly with project managers. Someone also needs to be focused on the product and how the team's efforts fit into the longer term product goals. If that isn't anyone with a PM title it will be someone else playing that role with everything but the title.