Summary of Closing the offer/answer rollback issue?

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Is there an email in this long thread that summarizes the issues?
It's impossible to follow this thread. :)

I'm not clear on what the issues are with pre-conditions that make failed offers concept break.  To me, pre-conditions are basically not real SDP offers; they're conditional offers.  Until the *all* the conditions are met, it's not "committed".  You continue using the last committed state.  I know there are race conditions, but considering how rare pre-conditions are in the real world (especially in re-Invite's), that I'm having trouble imagining why we should care about corner cases of such.  Regardless, I vote for any fixing that needs to happen because of pre-conditions should be around changing pre-condition logic, even if it means completely re-writing how pre-conditions works - don't change normal SIP or SDP. (not that anyone is proposing it, I just can't tell form this thread)

Re-Invites and SDP offer/answer have so many interop issues in the wild even without pre-conditions, that this whole thread scares me. :(

-hadriel

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