I've been sober for around 14 months now, 8 of those with no "support group" but SR. I participated in AA for my first six months of sobriety, but decided that it wasn't for me. I do see a therapist monthly, but I consider SR to be my main sober network/support.
But. It'd be incorrect to say I
got sober using just SR, and I haven't been sober for very long. More important than any sort of sober network, for me, is learning to interact healthily in "normie" society. I've considered myself antisocial for a long time; I'm only starting to find contented sobriety now that I've started breaking out of my shell.
I guess that boils down to a very qualified yes.
