But yes, it is somewhat common for people to have an idea of what it takes to get to a BAC of 0.08%, because that is the threshold at which you will be charged with DUI. For many regular drinkers, they won't be impaired at 0.08% and it takes less alcohol than you think to get there. Especially with modern microbrew beers. Getting a DUI will completely f*ck over your life, so if you like to drink socially, you are very careful.
In England and Wales, a drink-driving offence would attract a minimum of a 12 month disqualification unless there are very compelling mitigating factors. On a second offence (or a serious first offence), you would usually have to undergo a medical examination and re-take your driving test to get your license back.
https://www.sentencingcouncil.org.uk/offences/magistrates-co...
https://www.gov.uk/driving-disqualifications/disqualificatio...
https://www.thisismoney.co.uk/money/cars/article-10304829/Mo...
Anecdotally, I feel like it's actually gotten less common over the years. When I was a teenager I would meet adults who were riding the bus because they'd had their licence taken away. Often it would be for a 6 month period before they could re-apply (without retaking the test). That became less frequent at some point.