I've posted it before and will post it again - I know quite a few young adult addicts who are now in their 40s and have been sober for 20 some odd years and are pillars of society. In addition, my aunt fostered 2 young children - W was 6 weeks old when he was removed from his mother, a year later, she began to foster his older sister C who was 2 at the time after the state removed her from her mother's custody for horrific neglect. My aunt and uncle had those babies until they were school aged and brought them up beautifully, finding and working with their adoptive foster parents to ensure a smooth transition, employing lawyers to finally terminate the (neglectful, uncaring, drug addicted, absent bio) mother's parental rights. (bio mom never wanted the kids, never showed up to court but the term process took forever bouncing from case worker to case worker)
C and W were delightful children being raised by a wonderful permanent adoptive family and they did well until adolescence. C became a runaway, drop out and heavy drug addict in her teens, giving up her own baby for adoption, and bouncing in and out of recovery programs. My Aunt and Uncle actually went looking for her at the behest of the adoptive parents- across states - trying to talk sense into her. (they were always in close contact with the adoptive family) She wouldn't listen. Tattoos, piercings, sleeping around, homelessless and all that went with it. Her younger brother was horrified, yet he too followed in her footsteps a few years later. C got pregnant again around age 20 and straightened her life out. She is now a married mother of 2- she must be 26-28(?) or so and is living an exemplary CLEAN life and I believe she has finished college or is close to it. She did get a GED and at least an AA and I think she has gone forward from there to work on her BA. She plans to teach. I am not sure how her younger brother is, but I know everyone was really dismayed when he went off the path. They had such high hopes for him since he had never been neglected-straight into state custody at birth and then to my aunts - but he was born addicted, so he probably became an instant addict as a teen.
I have a close family friends whose bio granddaughter KK was mentally ill (BiP iirc?) and a HS drop out, volatile, drug addicted-she was a complete mess. Got pregnant at 16, did rehab, gave up the baby for adoption. Wilderness helped but she relapsed. Ended up in a military-esque HS boarding school/tough love recovery type last chance program of some sort (I am light on details) and she did ok. Graduated HS, joined the military and has stayed clean. Married a fellow military man, had a baby, re-upped (her H did not), the father of her first child (that she gave up) died of an OD and she went to the funeral with her 80 yo grandmother at her side for support. She had a third child and is now a civilian - her H completed school on the GI package and she is a CLEAN (10 years?) stay at home mom raising her two kids, attending college and is likely 30 or so. (I babysat for her when I was a teen, guessing to her age!) By the way, her older sister KT (bio, only 10 months apart) was a straight and narrow, straight A student who attended Ivy Leagues. KT was a perfect as perfect could be and KK was a complete mess. Night and day, same DNA, 10 months apart. Go figure.
Be realistic, harden your heart, but keep the light on. We won't tell anyone but each other that we are nurturing that tiny flicker of hope.