IMO ethanol needs more than just a bit of H2O, a minimum of 15-20% H2O is about as potent as can be gotten away with, in my experiences using azeotropic ethanol, diluted to form..well not so much an alcoholic beverage, more 'how small can you make the oral dose, along with a fruit juice chaser', and when it's down to about 1/3 of a tea cup full, diluted down from azeotropic EtOH (undenatured of course, this was medical grade ethanol, and 95% actually produced a fair bit of gastric pain the one time it was tried undiluted from 95%, so 1/3 to a quarter teacup full of the azeotropic EtOH, diluted to a half cup or just over, with fruit juice was about as concentrated as it could be made without doing so. Just a single cup however, one shot, and you'd have about enouh time to smoke a miniature cigar, stub it out and kick off your shoes with the lights off and some Disturbed set to blasting out as loud as the laptop would go using linux (using the booster to get it to 153% volume), that'd have me off to sleep/out cold in just that much time. Maybe with time to scarf down a fistful of jelly-babies or two, chew, swallow and drink more fruit juice and maybe a gaviscon chaser. But definitely not enough time between ingestion of the ethanol and passing out, if one opted for the cigar, since a smoke is definitely pleasurable whilst shitfaced drunk, you'd not have time to bite off the heads of the jellybabies, or root out the black and the green ones and eat those first (for some reason the black and the green ones are by far the tastiest

) before passing out to wake 5 hours later, covered in jelly baby torsos.
And you might, might get one more such shot of concentrated liquor before hideous hangover territory. Three such measures and you'd definitely get a filthy pukefest of a hangover. And believe you me, you do NOT want to know what puking something like 75-85% ethanol mixed with gaviscon and jelly-baby-heads out of your nostrils is like. It isn't pleasant and not something I ever wish to repeat. I even got a hangover with an alcohol dehydrogenase inhibitor (chlormethiazole) present after three cups of that weapons-grade booze, and a rotten one at that, that NEEDED a shot of morphine and 150-200mg rectal cyclizine to feel anything like human again, plus, after both, being able to swallow some ondansetron pills and keep them down, rather than plugging being mandatory for the drugs other than morphine. Was a fair while before I could keep my next dose of chlormethiazole down too, as that turned into a gutbuster the time I tried making the ethanol too little diluted. Wouldn't repeat at that dilution (90% or so or toss and wash with the neat azeotropic stuff)
If powdered alcohol ever gets to take off, it'll be either a carbamate of another alcohol, or another alcohol encapsulated in cyclodextrin etc., something potent and euphoric. And measured in small dosage units, maybe even 'alcohol pills', with a suitably potent alcohol, given the potential for fatal overdose with alcohol type drugs.