You don't need to keep the primary development team as primary oncall 24/7. "Hire people to keep an eye on things off-hours, follow playbooks when necessary, an

You don't need to keep the primary development team as primary oncall 24/7. "Hire people to keep an eye on things off-hours, follow playbooks when necessary, and escalate to the right people if they can't resolve" is a reasonable pattern that folks have done for decades the world over. You get less incentive alignment perhaps, but it really isn't hard to come up with ways to make creating work for another team unappealing.