Genuine question, and I'm not having a go - but is that a joke, or would you have done that on a trip with the kids? (presume you're taking them given it's a half term trip). Only asking because it's hard to gauge from this thread what people's normal drink amounts are, and what is prompting them to give up. From reading the thread it seems as though going dry is something everyone should do, but then you read about some people's drinking habits and realise your own aren't anyway near that (again, absolutely not saying you have a problem, but that comment jumped out at me a bit). Maybe some people don't notice the health / sleep benefits because they didn't really drink that much in the first place?
Some of it was in jest/exaggeration...
The "going on holiday" pint with breakfast does seem to be somewhat of a British tradition - https://www.telegraph.co.uk/travel/comment/great-british-tradition-of-pre-flight-boozing/ - but it's not for me. If I'm in a lounge, I'd certainly have a mimosa or similar, however.
I'd also have a few drinks on the plane too, more so if not flying cattle class.
And I would certainly enjoy drinks whilst on holiday itself - I don't think I'm unusual in that.
(It is a family holiday, including my son)