I think when people start with the pick-random-high-number-out-of-the-sky-because-it-looks-bad, it invariably invalidates any other useful point they might have. This is true of the internet generally - and not specific to any one person in this forum.
Some people have had issues. PC's are weird & varied things, and its inevitable with a game that generates this amount of interest is going to suffer this. My PC is not the same as your PC, nor Fred's next door, etc.
There's a reason why top-level development houses like R* develop primarily for consoles - it's because they can write to known hardware that doesn't change. I know they're financially motivated to do it, but I'm incredibly grateful that they've done this port, because it was obviously a lot of work, and not something that they've done for all their titles (RDR1 I'm looking at you in a stern way).
Anyway, it's running great for me, and it's starting to run better for those who have had problems. So, let's just chill & enjoy the ride they've given us.