Converting a PS4 Persona 5 Royal NG+ Save to Steam with Adversarial Interoperability

On this page Why do Persona games keep getting remakes and remasters? It's me. I'm the problem. I find the surveys Atlus sends and say "I will pay money for more remakes": While I wait for Persona 4 Revival to release, I want to replay 5. Specifically, I wanted to do a New Game+, since it goes much quicker than the normal 100+ hours to beat. I played the initial release when it launched in 2017 on the PS4. [1] When I heard Royal was getting a release in 2020, I decided to wait and NG+ that. Only problem is that Royal changed the game so much that you couldn't port your save over, so I had to start fresh again. This time I actually can NG+ on my PS5, but I am now past my second year of Linux gaming and figured out I could use my desktop as a Steam Machine thanks to a 50ft HDMI cable. Plus, Sony hasn't been behaving favorably lately. Persona 5 Royal was 80% off on Steam recently and as I already established, I will repeatedly pay Atlus for their games. Only problem is I don't want to…