Originally Posted by GUWonder

Widespread adoption of APC by US airports of entry preceded MPC.

MPC has been up at times in some airports/terminals when APC has been down — including times when APC had outages.

CBP has a history of having cut off MPC at times and places even when the airports, airlines and other stakeholders didn’t want MPC cut off. MPC being turned off or out of service doesn’t bother the airports, airlines, and passengers as much as turning off APC since MPC has had low use volume generally — and extra low use during the pandemic — while APC has had much more extensive use pre-pandemic.

CBP doesn’t have dedicated MPC staffing as a priority, and that’s shown since the beginning of MPC. And as CBP personnel assignments at the MPC airports are generally fungible, CBP does what CBP wants with MPC. It shows when CBP have combined MPC with the regular lanes for diplomats, APEC and/or flight crews; routed MPC users to the CBP personnel handling GE in part; routed MPC users with a shortcut to one or two counters handling MPC users along with other arrivals; or had MPC pulled/switched off (regardless of whether or not APC kiosks were in use at the time and place as competition to MPC).