For most people, including myself, the SP rating is meaningless.
Although my mobo reports SP (Z490-A), I bought the mobo for functionality, not to show me a 'negligable' number. And even then I screwed up. I didnt realize, and didnt even look for overclocking features. I just assumed the STRIX line carried them. What I am missing is dual bios, onboard reset/power buttons, and REAR PANEL CMOS RESET. I downgraded from the X79 Rampage Series not realizing it. My fault for not checking.
Back to my opening comment. I say the SP rating is meaningless because the average consumer is now stuck with that CPU, regardless of the SP rating. Simply because of economics. Not many people can afford to ditch a top-tear $1000 CPU. So, regardless of the rating, the consumer is still stuck with a 'bunk' chip.
Also, any serious overclocker doesnt need a synthetic number to establish overclocking potential. The first few steps will indicate.