From what I heard the 12 beta became 11.5. I'd go ahead and update to 11.0.1 as 11.5 hasn't hit RC yet and there are some good features and improvement in 11.0.1 that are worth the upgrade. From there, once 11.5 is released you could plan out an upgrade there. I've been testing the beta and there are also some good features here that I've been seeing. I wouldn't wait until 12 though as that seems even further out.
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