This thread reminds me of an old Cheech and Chong interview where the lady asked them if they're still experimenting with drugs, and Cheech said that they don't still experiment with drugs, they're past experimenting and know exactly what they're doing now

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If you mean quit getting high, then no. Assuming I don't die by 33 like Jesus, a cure for mental illnesses is discovered, or find a dream girl who makes me happy enough to quit(except weed and psychedelics, that would be a deal breaker) I could see myself being a crazy old fart doing a bunch of drugs, with everyone wondering how the hell I'm still alive. There's some old addicts, some using since the 50's and 60's.
If you mean quit trying new substances, no, I'd like to try as many different drugs as possible in my lifetime. A bit like some like to try different wines and beers.
The way I see it, we are all going to die. I don't believe in an afterlife. I think this is it. I feel everyone should enjoy life and be kind to others, because you and everyone else will eventually no long exist. Sobriety is boring. I would rather die by my 60's living life to the fullest than live a boring life till 100. Although that belief may change if I make it to 50, or a radical change happens in my life that gives me a reason to go on the straight path.
I could see myself using less drugs less often, but only if I had a kid where buying drugs with a strained budget would take food out of their mouth and lower their quality of life.