There is also a different buyer group. They are not interested in sporty driving. They have money and after driving SL and E or S class Mercedes they finally want to own! a Porsche.
I see this people often here. Mostly around 65 and creep around on sunday.
Second group, the business leaser, working at a bank in Frankfurt (or else) and using the 911 as daily driver as every other car.

Chat with your sales guy about the typical 911 buyer. They are not like the people here and other car enthusiasts forums.

I took a look at the german porsche web site for used cars.

514 991 at all
308 with PSE
249 with SC
157 with SC and PSE

So only 25% speced their cars with SC and PSE

Second look
Non S 991 at all 116, with PSE and SC only 13

With the 997, SC is a must have because the 997 didn't had the sport button as standard, but all 991 have the sport button. With that throttle response is good enough for most people.
I have to admit that I also never used sport+ in the last 3 years, even sport is seldom used by me. But I always put the PDK in manual mode, deactivate start/stop and activate PSE and I am not driving slowly.......


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daily: BMW 430d
for fun: Porsche Boxster GTS