The Importance of Urgency in Alerts

I feel like email alerts are where alerts go to die. It might as well not exist properly. I have gotten sorted some email alerts before. They're interesting. And the criteria that we've used is, okay, if this alert fires on Friday evening at 5 p.m., will you have enough time to react and prevent it from becoming a major outage in the next 48 hours? Like, is it actually okay if it waits till Monday? You need that 48-hour window. So urgent doesn't necessarily mean like it needs to be handled this minute, but it means like we cannot wait for the dev team on Monday. Maybe there's 12 hours, but if it's less than