I am not sure I can /recommend/ it; sobriety is underrated. But a number of people have proposed GHB or perhaps a prodrug of GHB as an alcohol substitute over the years (for example [1]). It acts on the same receptors in nearly the same way. (It reverses alcohol withdrawal so effectively it is used for this purpose in some countries medically.)

Subjectively it feels very much like alcohol. It is probably about as addictive. But it's almost non-toxic by comparison. No liver damage. Doesn't affect nutrient absorption. Milder hangover.

It'll probably never be legal for regulatory reasons. (If alcohol were introduced today, it would likely be banned. Even a relatively safer alcohol substitute runs into the problem of still being rather dangerous and so getting through the red tape.)

[1] https://www.imperial.ac.uk/news/135106/synthetic-alcohol-sub...