What does smoking pot everyday do to your brain after 40 years of smoking?

I've been using cannabis and been around cannabis users since the 1960s. Every one I know just gets "mellow". Quite the opposite of the behavior you describe.

Be interesting to know how his parents or friends described him in early years, whether the seeds were there, or weed did it.

Weed, alcohol and cigarettes are 'Laura's and by that I mean it STARTS good, draws them in, then often turns on them.

I imagine your father's inner life wouldn't be good at all.

Good to get right away.

It prevented him from seeing the truth about himself. Sad.

it sounds like it fried his brains

I don't think they've done many studies on this