I have updated/created new KBs to reflect the current status.
A MTP-APM TIM Release Compatibility List TEC1241257 – Updated info on MTP 10.3 and 10.4 KBs
Which versions of APM 10 are compatible with MTP 10.3. TEC1643212 -- Now updated to say before mid-year 2016. Hotfix is being tested.
Which versions of APM 10 are compatible with MTP 10.4 TEC1185456 -- NEW KB. Says Not compatible with any APM version and no support date planned at this time.
I will do what I can to provide updates once I receive them.