Yes, I would say he is a functioning alcoholic and she might be as well. Actually "high" functioning. They have good careers, they don't drink and drive...hiring taxis instead. They have several good friends. They are fairly close to their adult children and don't seem to have family arguments...no more than typical...and nothing extreme. They don't have money problems and are respected in their community. She is very proper in attire and speech. He is in attire, but when he has drank a lot, at times will say inappropriate things even in public. One (maybe the only one) of the maladaptive behaviors of note.

Sooo.... Can someone be a functioning alcoholic indefinitely? Estimated age 60-62. Has been drinking for perhaps 20-30 years with increasing frequency. Of note, he has a health problem (unrelated), but I looked it up and it said flat out that frequent alcohol use can exacerbate this condition. Either don't drink or lite drinking only. This is so not the case.