[t-writescode]

I think the model that I prefer is: "if you're going to deploy some code in the evenings or beginning of the weekend, you're on call for the code you added until work day tomorrow"

And have it be only around the code you just added.

If you deploy (and validate) earlier in the day or not on Friday ( or whatever the end-of-week day is) then that requirement is gone.

I've definitely seen code get deployed at 8pm on a Friday night; and, who knows if it was guaranteed to work. That person definitely should be on call for it.