Dark Souls never was an exclusive and it was published by Namco. Demon's Souls would be a better comparison and it was never ported to the PC unfortunately. Sony is publishing the game and I'm not sure it would be in their best interest to have one of their only notable PS4 exclusives available on an other platform.
Requiring a PS4, which many people haven't bothered with yet (whether from not enough exclusive games that can't also be bought on PC, owning an XBox One instead, or just being too broke to drop $400 on a console for one game).
I purchased a PS4 from amazon and got it in today. I got Bloodborne with it for someone else in the household (nothing out I particularly care about currently).
It bricked within 6 hours and looking at the negative reviews on Amazon the way it bricked and it doing so w/i days turns out to be a very common occurrence for the PS4.
It's not common at all. More than 20 million consoles have been sold to date. If it was a common thing you'd hear about it a lot more places than Amazon reviews.
hit up google for the most common issues with the PS4.
I'm glad you've gotten lucky. Really, I am. But when a PS4 bricks after 5-6 hours of use and you find thousands of reports of the same thing on a single website.
Well, you may want to define common, but the point remains.
http://www.twitch.tv/directory/game/Bloodborne