I'd be very surprised if that were true. STC's are considered proprietary and that's why they are not available to the public for one, and I wouldn't expect the FAA to do away with per S/N STC's.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.