i hadn't really looked into this before.
i guess it's what you'd have to expect, really: alcohol damages your ability to take information out of ram and store it to your drive. so, you lose the session. and you eventually crash.
it's a reminder that memories aren't mysterious, metaphysical abstractions, but energy stored in chemical bonds. and that we are machines...we really are...
https://www.livescience.com/14952-alcohol-blackouts.html