I have read that there are a few people doing ok with it but there are some that are struggling as not all features have been fully tested and built for with the new architecture. It might take a few versions to get all the bugs out. One experienced user here put it that it was no different than when Apple went with the Intel framework and it required all software companies to do a complete rewrite in some cases. I believe Adobe had the same problem and struggled in the beginning. Not unusual.