I think nearly every single one of my riding buddies who has gone through the GP4000Sii hype phase has also gone through the “too many sidewall cuts” phase and ultimately switched to a different tire.
Here in CA, our roads aren’t roads. They’re cracked up concrete covered in glass and gravel. Loose over hard, if you will. We run over 10-30 (rough estimate of course) small rocks on every ride. Most of us have been hit by rocks flying out from underneath tires multiple times. It’s not rough roads that gets GP4000Sii sidewalls. It’s gravel.
One of my friends talked to a conti rep at Sea otter and asked him about the sidewalls on GP4ks and I remember him saying something along the lines of “I wouldn’t train on these tires”.