Accidentally shifted from 3rd to 2nd

Zoren 370

Have I owned my Z too long that I have forgotten what's the SRM and rev limiters are for? Both are 2 different things.
Yes the SRM would rev match when you shift to a lower gear to save you from doing a heel and toe shifting. The SRM is there in a way to protect the tranny which allow you to engage smoothly into a lower gear without experieing the sudden jolt like your car is suddenly want to decelerate which sometimes you use to aid as emergency brake In a manual without SRM. Thus the SRM in a way lessen the strain on your clutch engagement.
But yes I agree the SRM would not save your tranny on an over rev situation such as on a red line zone.
I do not believe op was not in red line zone when he downshifted. Plus the rev limiter is an indicator to let you know that you need to up shift to a higher gear and not to lower gear. Unless you are at 6th gear already.

Being said I do not think OP has jeopardized his tranny or engine. The SRM would have alerted him with a sudden up rev of the engine and not the other way around with it being turned off which is more damaging without doing a heel and toes shifting.