Are aircraft upgrades permanent in Ace Combat 8?
Upgrade parts are confirmed, but the publisher has not explained whether every upgrade is permanently owned, freely removable or tied to a loadout slot.
Confirmed explanation
MRP can be spent in the aircraft tree and Ace Pass rewards can include aircraft upgrade items. Bandai Namco separately says it currently has no plans for consumables, which argues against treating these items as one-sortie boosts.
What is not confirmed yet
Respec rules, duplicate items, slot limits and mode-specific restrictions remain unpublished.