I definitely hold that PSX was the golden era. If you like it could extend on both sides SNES-PS2, but I think that's overstretching it to make it less meaningful. The tails are more like silver age or something. PSX really had that boom in RPGs due to the popularity of FF7 (although some great PSX RPGs came even before that) and I think maybe paired with the issue that early 3D games were kind of wonky on controls contributed to favorability of RPGs over some more action oriented games. Either way, it definitely has my favorite RPGs of any era with at least my top 3 of all time, so it's pretty solidly the gold standard for me. That's not too say that the current era hasn't had some great RPGs (I'd even say there's a resurgence after the dark ages of PS3 era), but it's not the same as a golden age.