you're not responding to op's point, unless you're insinuating there won't be any managers ever, which won't happen. As long as there is one manager left, OP's point remains.

This. We moved to 'agile' roughly at same time llms started coming. You know who is mostly missing from the wider IT teams landscape now? Most of PMs and BAs, on purpose. Who is keeping their work - devs or more like devops, surprisingly testers (since our stuff seems ridiculously complex to test well for many use cases and we can't just break our bank by destroying production by fast half-assed deliveries).

And then admins/unix/network/windows/support team, nobody replacing those anytime soon. Those few PMs left are there only for big efforts requiring organizing many teams, and we rarely do those now.

I don't like it, chasing people, babysitting processes and so on, but certainly just more work for me.