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Question: So if someone were to start a new social network in a few months, is it better to use Dolphin 8 or Dolphin 6/7?
Dolphin 6: There are some bugs with it but it works for the most part and it continues to be better with each fix.
Dolphin 8: Sounds like a step in the right direction but its completely new and untested.
In several month - you'd be able to choose. Dolphin 8 will need some time to catch up on terms of functionality. So, if the very early release of 8 would have enough features for you - it's the way to go.
Dolphin 7 and 8 still not released at all, Dolphin 8 just under development progress. Nobody can`t have it and test.