Yeah - it's a nice thought to have such games across multiple platforms but some games aren't meant to be played on all platforms as they can't carry the game.
I know that you have been having this issue with your storage on your PS4. I believe that getting a new console and likely PS5 would solve this problem permanently for you.
I believe that Sony is trying its best not to copy PC gaming platform but to make something that's unique to their brand. We may never see the 1440p on PS consoles.
Seriously, it's not only you that feels that way towards the game RDR2. Perhaps, if it's something that they get to do one day, you will see there are lots of gamers that wish for same.