From this interview
https://kamedani.tumblr.com/post/642...geki-interview
Dengeki: With the new expansion there is going to be a graphical upgrade to the game. Is there also going to be a change in the minimum PC requirements?
Yoshi P: No, we are working hard on the PS5 version to make it look as good as possible but since this is going to be the final chapter in the Hydaelyn and Zodiark storyline, we decided not to make any major changes.
I want to update the graphics engine at some point since the amount of data used has gotten quite great over these ten years. Also, we want to rebuild the data access system to support 4K graphical textures.
Players have also told us they want their mounts to feel more alive but for that to work we will need to do a graphical overhaul. We are, of course, doing this little by little.
Please remember that we work on schedules planned years at a time. We were able to fix some of our data center issues on this schedule over a long period of time fitting in work where we could. So, when it comes to updated graphics, it is something we want to do but don’t have much free time. It is quite a challenge to do as well so please be patient.
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This wouldn't be such a strain if SE had actually made high res textures then downscaled them way back when 2.0 launched like every other mmo
That being the case, ouch, spaghetti code strikes again on data limits