The two questions I'd look at:
1. What was the total excess mortality during that period? In many countries, the official totals are significantly lower because they only include lab-verified cases or don't cover things like, say, someone dying of a heart condition they had been successfully managing before contracting COVID.
2. How many people would have died without safety measures being in place, especially people who would have been unable to get unrelated medical care they needed because the medical system is over capacity.
The second number is obviously fuzzy but it touches on the biggest factor for ending it in my opinion: vaccination rates. If you have a high percentage of the population vaccinated, you are still going to see spread but that shifts it closer to something like influenza where you might still want additional measures for some high-risk activities (e.g. indoor dining without good ventilation) but you're not looking at ICUs being flooded. The current vaccines appear to give something like an order of magnitude reduction in that risk so those are what I'd tie re-opening to those rates.