Why do you have to go and make things so hard for me??? Sigh! It would have to be the regular, paltry 825 GB disk version for the backward compatibility with my large collection of physical games.
Okay, I now see that backwards compatibility is very important for you because you have a large library of physical copies of games.
I want the regular edition too but not necessarily because I have a large library of physical copies of PS4 Games; I want to be able to consolidate gaming and my playback of 4K Blu-ray discs to one machine (I currently use a dedicated 4K Blu-ray player, since Xbox One X's playback of 4K Blu-ray dIscs is inferior according to reviews).
As for the PS4 titles that I've bought, they're practically evenly split between physical and digital copies of games.
PS4 Games That I've Bought Physically
01. Batman: Arkham Knight (sold to GameStop then bought a "physical" copy for PC [the disc's purpose was simply to redeem a digital copy via Steam])
02. Bloodborne
03. Grand Theft Auto V (sold to GameStop then bought a digital copy for PC)
04. Horizon Zero Dawn
05. Infamous: Second Son (sold to GameStop)
06. Killzone: Shadow Fall (sold to GameStop)
07. The Last of Us Remastered (sold to GameStop in 2014 but bought a digital copy last month)
08. Metal Gear Solid V: The Phantom Pain
09. The Order: 1866
10. Uncharted 4: A Thief's End
PS4 Games That I've Bought Digitally
01. Battlefield 4
02. Days Gone
03. Death Stranding
04. God of War (2018)
05. Metal Gear Solid V: Ground Zeroes
06. Mortal Kombat X
07. Red Dead Redemption 2
08. Marvel's Spider-Man
09. The Last of Us Part 2 (pre-ordered via PlayStation Store)
10. Uncharted: The Last Legacy
11. Watch Dogs 2
My most recent PS4 purchases have been digital and I think that I'll continue this trend with the PS5.
Buying games digitally is pretty much the only option on PC, so I've gotten use to doing so on all platforms.
I'd prefer physical copies due to the assurance that they'd normally provide in regard to never losing access to games, but most games require huge patches that have to be downloaded digitally anyway, which eliminates the advantage that physical copies would otherwise provide.