This is an extremely confusing statement, considering that Angular2 is only at RC5 and has had many major breaking changes to the API and core components ranging from 3 completely different router builds, introduction of NgModules, greater integration with Observables, a compiler still being developed, etc all since it left "Beta" in May.
I'd have to guess you left Angular2 to go back to Angular1 considering the current state of development
Not really. I'm more of a backend developer, but around the time it went beta (early 2016) I felt it was a good time to be ahead of the curve. So I started learning it with no Angular 1 experience. I've followed it through the betas and RCs.
I recently picked up Angular 1 just because it seemed like a good idea (I often mentor others), not because Angular 2 wasn't in a good state. (If I had to do a project today, I'd probably go with v1, just because the ecosystem feels richer)
I'd have to guess you left Angular2 to go back to Angular1 considering the current state of development