cap ac + wifi-qcom-ac = 
Regarding future proofness:
https://forum.mikrotik.com/viewtopic.php?p=1108989#p1107303
Looking at the system resources and roughly free-memory of 36MB it is IMHO only a matter of time that we may see here similar issues like these: http://forum.mikrotik.com/t/v7-16rc-testing-is-released/177857/1
And this 36MB of free memory is not “overconfiguration” at all. It is basically “/system/reset-configuration caps-mode=yes”. Nothing more on it.