Part Deux is absolutely correct, if brief. The PCM's flash memory is only modified when a new program is flashed in. This is done either by the dealership with a StarScan device or with a custom programmer such as the DiabloSport Predator.
On the other hand, learned adaptives are stored in volatile memory that is not flash memory, and is lost when you drop battery power. That's what you want.
Now, it's entirely possible you might benefit from a flash to a newer PCM code for other reasons, but for what's stated... no.
2008 Brilliant Black R/T R&T w/SRT hood, fascia, diffuser. Brilliant Black aluminum rear-window louvers, coolant bottle, custom vented fenders. Borla 125 catback. Red stitched shifter & console. Clifford 50.7X alarm. 35% tint w/15% third visor. Stubby “O” antenna. Steering wheel R/T logo. DashDAQ. Jina’s BSG62 floor mats. Predator 91 tune. AAC front & rear LED halos, UV gauge halos, HID fogs, scanner bar, reverse LED strips. Razor’s Edge strut brace. Reverse sensors. Tinted tails. Toyo Proxes 4 245 front 275 rear.
Billet Tech: BSG62 hood & tail emblems, wheel-centers, visor covers, fuse box cover. Custom CHARGER badge. Shifter plate. Frankintake. Satin door locks & pull-rings, engine kit, coil-pack & valve covers.