I won the SSSS lotto a few times on international trips (FWIW, always on the return side of the equation (CDG-ORD and GRU-ORD)). The worst part was missing the Pre-Check clearance on the domestic connection.

I always hold my breath when checking in for my return flight to the US; Lady Luck was on my side today (no SSSS on FRA-SFO for tomorrow, 4/22)!