From my experience working on SaaS, and improving ops at large organizations, I've seen that "on-call culture" often exists inversely proportional to incentive alignment. When engineers bear the full financial consequences of 3AM pages, they're more likely to make systems more resilient by adding graceful failure modes. When incident response becomes an organizational checkbox divorced from financial outcomes and pla…
This assumes that the engineers in question get to choose how to allot their time, and are _allowed_ to spend time to add graceful failure modes. I cannot tell you how many stories I have heard of, and companies I have directly worked at, where this power is not granted to engineers, and they are instead directed to "stop working on technical debt, we'll make time to come back to that later". Of course, time is never…
If it's important enough to deserve a page, it's top priority work. The reverse is also true (if a page isn't top priority, disable the paging alert and stick it on a dashboard or periodic checklist)