He was so high on coke all the time he most likely couldn't help himself - or come down. He was supposedly doing coke with John Belushi the night b/f Belushi died.
Not a fan, always found him obnoxious and Mork and Mindy unwatchable and stupid.
When he was diagnosed with Lewy Body Dementia, which some feel contributed or was the cause of his suicide, I wondered if it was from years of heavy cocaine use.
That’s interesting and I’ll bet you’re right! In 1985, my fraternity buddies and our girlfriends took a caravan road trip from CY Boulder to Los Angeles. The girls went their own way, one night, to a bar and sat at the counter to find Williams sitting there. Of course, he put on a little show for them and openly did a ton of coke and got trashed. Would have been interesting to see, but sad.