Young me got that lesson when trying to play ARMA 2 on a 5400RPM HDD. It would run 60FPS if I didn't move but as soon as I started moving the game started stuttering. When I installed it on a 7200RPM HDD the game no longer had any performance issues.
It all comes down to what specs the game was designed for and I imagine most modern open world games are designed for SSD-s. Putting them on HDDs will absolutely have a negative effect.
Young me got that lesson when trying to play ARMA 2 on a 5400RPM HDD. It would run 60FPS if I didn't move but as soon as I started moving the game started stuttering. When I installed it on a 7200RPM HDD the game no longer had any performance issues.
It all comes down to what specs the game was designed for and I imagine most modern open world games are designed for SSD-s. Putting them on HDDs will absolutely have a negative effect.