For some perspective, CD trays, like the PS2 and Xbox had, that retracted mechanically were viewed as sleek and futuristic, and that’s why slot loaders like the Wii and PS3 gained traction too.
It was an aesthetic choice, like the move from green LEDs to blue, though that has historic significant as blue LEDs are a relatively recent invention as the were incredibly difficult to figure out, so blue LEDs were seen as futuristic and opulent and used in everything consumer electronics for a while.
Literally untrue I promise, even worse, you’re extra wrong because the PSX is actually the name of a Japanese specific set top entertainment box that also played PS2 games and was the introduction of the XMB ( Cross Media Bar ) interface that the PSP and PS3 both used.
The small PlayStation did have the official designation of PSOne though.