PRs have dwell times of weeks. It’s all broken, but somehow we are all convinced that this is better than a formalised change review process.
Never mind the inability to plan work, or having to have yet another discussion with some corporate random that happens to be reviewing your PR and has a thousand questions as to why this particular functionality needs to be implemented, and why weren’t they consulted - dude, here is all the process documentation, go complain at management, not me.
But in the meantime, management wants to know why x was not delivered on time.