From PS4 Pro tear downs it can be seen that the Blu Ray chip is now located on the motherbaord instead of a seprate daughterboard installed on the Blu Ray Drive like it was on the original PS4s
http://www.psdevwiki.com/ps4/BDP-025
https://de.ifixit.com/Teardown/PlayStation+4+Pro+Teardown/72946
original PS4 daughterboard of the Blu Ray Drive having the Renesas SCEI R9J04G011FP1 processor
PS4 Pro motherboard having the Renesas SCEI R9J04G011FP1 processor on the motherboard (in green)
comunication, updating and flashing should now be a lot easier in order to run 4K Blurays on PS4 Pro
My online systems: Mac M4 Apple sillicon+16 GB, PC Vega 56+Amd Ryzen+32GB DDR4, Xbox Series X, PS4 Pro, Switch Lite, Playstation Vita TV, PS3, PSP
My retro systems: Wii U, DSi, Xbox, PS2, Dreamcast, N64, PS1, Sega Saturn, Neo Geo AES, SNES, Evercade
