Would it even *work* as a straight PS1 classic? Importing tracks would require extra code, either to reference the real system's disc drive or to import an MP3 or otherwise. And if you don't do that, you've got a vastly reduced game.
They also renewed Arc the Lad at the end of last year and Dark Chronicle in April this year. I want to believe that this is in preparation of new games incoming, but in reality due to digital distribution this is probably just housekeeping to protect their brands.
I got rid of my PSX ages ago but pretty sure I still have the PAL version of this. I was completely obsessed with trying every single song in this game. I can't remember which ones were best but I know Franz Ferdinand's "Take Me Out" was one of my favourites along with "99 Luftballoons". Obvious choices, I know, but still some fun was had.
Hopefully they don't blow a ton of money on this. I have a feeling all the recent glamouring after this niche title will not amount to much in terms of actual sales. But then again I guess a game like that doesn't take much to remaster at 1080p