Seriously? I am letting something cloud my judgement?
If you as Dev want your game to support anything older than the latest And and Nvidia cards you will have to put in optimization time on making sure your code works on older architectures. By the way I’m not the only person on the planet earth that thinks a closed box system brings advantages in performance. You seem to be the one with clouded judgement and biases. Nvidia fanboys are Idiots? What about Amd fanboys?

Unless the PC market can simplify gaming very similar to what nintendo, sony, microsoft has done, consoles will always be around. Most people do not want to mess with fixing, tweaking or upgrading technology. Fact

well not 100% sure what the limitations of gsync are but with current panels pending on manufacturer freesync can cut off as low as 30-44hz but freesync does actually work right down to 9hz but if your runnign at 9fps you got bigger problems hahaha

And most console games are 30 and free-sync snd Gsync don’t help you there.

You’re obviously letting some sort of bias clouding your judgment. There aren’t that many configurations for testers to validate. We no longer have Matrox, S3 or Via in the mainstream like 20 years ago. It’s just AMD and Nvidia and that’s it. And Intel on laptops, but the large majority of games aren’t tested for Intel anyway.
So there really isn’t a need for consoles anymore. Neither Sony nor Microsoft want people to realise that of course, so they will continue to subsidise exclusive games for as long as possible. And considering how many idiots are loyal to Nvidia no matter what, don’t expect the console makers to run out of loyal idiots anytime soon.

They don’t have to make it work on thousands of combos at all because that’s what dx11 high level abstraction is for it does most of the work for you. With dx12 it’s more difficult not sure how it will work but I think there will be enough abstraction for dx12 to handle the low level calls for the 4 different architectures mostly by itself as long as the game is coded properly for low level, so PC’s will get free performance boosts in some cases massive performance boost’s pending on your configuration. May even see people using quad core AMD processors and using the iGPU s as a floating point unit boosting performance in some areas although not sure if it would help for games that much

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Mantle and DX12 will help PC gaming, but your forgetting one critical thing the consoles will always have over PCs. Consoles still have the advantage of every system having the same exact hardware. This will still allow devs to optimize console games to a degree they will never reach on PC. So yes new APIs will allow lower level access on PC, but devs still have to make their games works on thousands of different possible configurations. So you should rejoice in the fact PCs are getting these new APIs, but calling it the death of consoles is a bit ridiculous.

Can you be even more obvious? Keep your bias to yourself and ask better questions.