From past experience on old cars... many years back ..not the meega..... flushing can cause more problems not less.
The theory is this .... the old gunge in a sump tends to collect and stick like s*** to a blanket, so is relatively stable, oil changes just leave this gunge in place, relatively inert.
You come along and bung in a flushing compound which starts to eat at the accumulated gunge, so loosening it, some will depart when the flushing oil is drained, but there is a VERY HIGH CHANCE that some loosened muck remains, or comes loose after, if you get my drift.
This then circulates with the new oil until it finds a nice small oilway to lodge in... now we have a blocked oilway and high wear ... probably not visible as a change (rise) in oil pressure.. even if we had oil pressure gauges .. which we don't...
As already stated .. regular oil changes with decent quality oil will leave the congealed lump alone and avoid these problems.
HTH