There are a lot of things that were misguided about the PC-FX, but the thing that always gets me is how bizarrely outdated its chiptune capabilities are. A lot of games used CD music anyway, but it's weird to watch footage of games released in 1997 that still sound like HuCard titles.
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PC-FX : Boundary Gate ~ Daughter of Kingdom (JPN)
YouTube video by A.R.A - Asian RPGs & Adventures