With my team, we have developed using Angular 2.0 beta candidate mid-size banking application for one of the biggest swiss banks, plus complex hypothec management and transfer application which is public on the bank website. We pretty much managed to release the apps before actual Angular 2 official release, and then we upgraded apps to official versions. It was really interesting to experience and it all went really smooth but we had to use Redux (just a note). So yes, there are some of us who are doing production ready code before the actual frameworks are released. Bold move, but a smart one in our case. Apps are almost bug-free (really edge cases are minor bugs). I do have to note that we are all Full Stack Java devs who have experience in banking and complex applications for a long time, plus we focused a lot on Angular in the past, so this transition with Typescript and Angular 2 syntax was a charm for us.