Am I right to think besides non-expiring miles and access to SKL when flying Y on SQ, there are no additional benefits to PPS (non-Solitaire) from KF Gold?

Is the spend of SG$25,000 solely on SQ metal worth what would appear to be very little in return? There are plenty of destinations that SQ doesn't fly to, even if you want to fly them. So really, we're looking at an annual travel budget in excess of SG$25,000.

I know there is some cachet sporting a PPS luggage tag, but is it just form over substance?