less serious items are not good reasons to discontinue the takeoff , especially as you approach V1
Engine failure, or engine fire are good reasons to stop.
THERE IS ONE OVER ARCHING reason to stop and that is a perceived inability to fly, serious control problems included.
A pilot must understand the systems and their limitations to make a good judgement at this critical speed.
BUT if you have checked the flaps and trim (and parking brake on some planes) and you have the warning it is a tough call.
the span air flight is interesting as the detroit northwest airline flight many years ago.
both of those were DC9s. our DC9 operations manual indicated if you stall a DC9 to put the flaps down to their max takeoff...firewall power flaps 15/17
You would immediately be flying if you did this and both the detroit and span air crash could be prevented or recovered with this mindset.
IT was drilled into us: FIREWALL POWER FLAPS !15 (md 80 slightly different number but same sort of idea).
ONE reason for configuration warning might have been movement of the trim (stab trim) without command...a trim runaway.
Good luck at this moment. Double checking things on the runway (killer items) seems to make this situation less likely.