I can maybe give you a bit of 'hope.'
I did not have cirrhosis when I got sober in '81. Had liver damage from drinking 24 years, 20 of it alcoholically, but no cirrhosis. However, because in my sobriety I was taking the max of Tylenol for pain, at 14 years sober I was diagnosed with cirrhosis. In the next few years my liver got down to 22% liver function and I would have been put on the transplant list at 20%. I suffered a lot of the side affects of cirrhosis, and had my esophagus lazered 3 times to stop bleeding.
Over time with diet and a doctors help, my liver did start to heal.
It is the only organ in the body that can regenerate. That is why they now do liver transplants from a 'live' donor. The donor's remaining 1/2 of a liver usually regenerates in about 10 weeks, and the other 1/2 that is in the donee takes about the same amount of time.
Today I live fairly well with 56 to 60% liver function.
So ................................. there is 'hope' for him, IF he chooses to find recovery and STOP ingesting alcohol.
Good thoughts and prayers going out to you and your family.
Love and hugs,