I'm not finding anything constructive above 6,000 rpm and the gear ratio spacing puts me in a plenty meaty spot so I shift there.
I didn't click "never, it's a porsche why would someone hurt it like that?" because I'm quite sure the engine can take the revs, nor am I worried about offending my car.
I'm old and learned to drive vehicles before rev limiters existed. I personally find the na-na-na sound annoying, but that's just my opinion. I was on a "toys for tots" motorcycle ride last December and some guy on a Hayabusa thought he was the shiz because he kept sucking in the clutch and hammering that limiter.
