A lot of us probably have multiple iMessage conversations open for the same person on our iOS devices, since there are at least four possibilities for everyone:
Your Phone Number - Their Phone Number
Your Phone Number - Their Apple ID
Your Apple ID - Their Phone Number
Your Apple ID - Their Apple ID
It's further complicated when an Apple ID has more than one email address associated with it.
OS X Mavericks's Messages app addressed this by consolidating multiple Messages conversations into a single thread, if the different Apple IDs and phone numbers were associated with the same contact.
Does iOS 8 do a similar consolidation?
Your Phone Number - Their Phone Number
Your Phone Number - Their Apple ID
Your Apple ID - Their Phone Number
Your Apple ID - Their Apple ID
It's further complicated when an Apple ID has more than one email address associated with it.
OS X Mavericks's Messages app addressed this by consolidating multiple Messages conversations into a single thread, if the different Apple IDs and phone numbers were associated with the same contact.
Does iOS 8 do a similar consolidation?