Dear @earthtones : " has been quite innovative with the Strain Gauge ..."
Not really innovative because strain gauge cartridges exist several years ago with designs by Panasonic ans Sao Win ( between others designers. ) and those vintage designs were designed to run with RIAA recorded LPs.
The SS design can't mimic the necessary inverse RIAA eq because its design is " different " and that's why comes with its dedicated phono stage, you can's use it with any other phono stage. No, it's a design for other kind of LP recordings but not for the ones that comes with the RIAA curve.
R.