Nobody wants to say it, but the only real distinction is the investors and the composition of those investor's portfolios.
When Tencent, Sequoia and Andreesen Horowitz are in the same room, its a startup, specifically a tech startup.
They could be selling hairgel with only a landing page for you to put your email address and it would be a tech startup. They'll make sure it is considered as much.
I have worked at Google and Amazon. I never required PMs to be in the loop for a feature launch at either of the two.
Having said that, both Google and Amazon has excellent PMs and there are teams that require PMs to be in the loop for a feature launch but it is not universal.
A good PM saves work for the team by shifting work away from from valueless investments. If a team is "slowing down to appease a PM" then that PM is worthless.
> A good PM saves work for the team by shifting work away from from valueless investments.
Knowing what’s valuable and what’s not is a function of being an employee. Designers and engineers should know where value exists.
If they need a PM to shift them away from valueless work, then I highly question their efficacy as an engineer. I also highly question that organization’s management structure and communication.
If I were being hired remotely by Reddit I would be pretty wary of a sea change the moment it becomes possible to work in an office again.