As an old person, what's the modern attitude?
That if your drink a single drink within 8 hours of driving you are a filthy criminal that will have blood drawn and thrown in the drunk tank until monday unless you post bail and will have to go to court and prove your innocence with a lawyer.
"the limits are bullshit unless you're borderline unsafe when sober but don't risk it because it's a revenue thing for the state and they'll try hard to get you."
That said, my friends work on boats, cut grass, weld, service generators, etc. for a living so probably the polar opposite of HN let alone the significantly less diverse weekend crowd.
At least my attitude is the legal limits are low enough that 'just one drink' is going to be over the legal limit (this is almost certainly not accurate, but it's my attitude; additionally when I drink, it's usually a mixed drink which are often more than '1 drink' for BAC estimation purposes). If you get a DUI ticket, even without a collision, it's a huge impact on your life: much higher insurance costs, loss of driving privileges, potentially an ignition interlock device which are expensive and inconvenient, maybe some jail time, difficulty at international borders, etc.
I have less than a handful of alcoholic drinks per decade, so it doesn't impact me, but when I would drink slightly more often, I would always be sure to have a transportation plan. Either public transit, a designated driver or a significant cooling off period between drinking and driving.