Many states have quite low legal limits and it's broadly acknowledged that being tired, distracted, angry, stressed, etc. is almost or as bad as driving over the legal limit. https://cars.usnews.com/cars-trucks/advice/best-cars-blog/20... In California it's .08. If for example I was at a party and a friend had some kind of medical emergency I feel it would be reasonable to take them to an ER despite being at .08 or .10 while being very cautious (assuming others were also not sober).

I know many people that live outside the US take a zero tolerance policy to drinking and driving in the sense that if you are going to drive you don't drink at all and I applaud that. I take the more practical approach of knowing how many drinks I can have at my body weight and can for example have a glass or 2 of wine during a 2 hour dinner but no more because my BAC with 2 drinks is under .08 and each hour 1 drink is metabolized.

I do fully acknowledge the more people drink the worse their judgement as to whether they are safe to drive so I expect many will get angry at me for the above. From what I recall most DUIs are for multiples of the legal limit but I can't find a source at the moment.