I forgot to blog about the Switch release of Phantom Breaker Battle Grounds Overdrive which sort of came out like this year or something. It is likely to be based on the Playstation 4 port with additional contents, additional shaders, additional enemies on screen as well as different soundtrack. It's a shame that there were rarely gameplay videos of the entire game on the Playstation 4 at the time after the game's release although there were already tons of them of the other versions. I don't know the difference between the Switch and the Playstation 4 versions although I already made guesses that the Switch version is identical to the Playstation 4 version.
Perhaps, people were already interested with next-gen looking Playstation 4 games as if they fulfilled the standards of the next-gen console. This on the other hand, had graphical enhancements when ported to Playstation 4. Sure, it looks like an indie-style game that whatever enhancement is unnecessary but this is made by the actual company. The other games whose graphics are like one generation behind the Playstation 4 are probably Darius Burst Chronicle Saviours, Super Stardust Ultra as well as the other games originally released on Type X2 and Ringedge 2 for the arcades. Obviously, it is quite unnecessary for the developers to redo the graphics from scratch for the sake of fulfilling the standards of the next-gen console as those games started off in the arcades originally.
The bigger reason of playing Phantom Breaker and its spinoff is the guest characters like the ones from Steins Gate and Chaos Head series and the 5PB visual novel games are still on-going as we speak.