I have already linked you to where Sony themselves say the chip is required. Not sure why you're saying manufacturers are making excuses?
I wasn't debating, I was asking you for source links so I can review where you got your information.
Now that I see it, I think you missed an important part of my post that explains that, simply because some peripherals can work around it, it doesn't mean that all peripherals are capable of doing so. This is implied in the blog post link you provided from Sony.
And, in Mad Catz case, a simple 3.50 update for the PS3 (not PS4) disabled those peripherals simply because they weren't "officially licensed" which, even in your link, the implication is made that this can occur.
If, at any point in the PS4 life cycle, these updated drivers are used to make unofficial peripherals, Sony may impose a block on any unofficial peripherals and the Mad Catz issue returns. Mad Catz was still in business at the time.
It is true that Logitech is no longer making or supporting racing wheels (which I've already mentioned), so there is no work around that will be made and there's no one that a games developer can contact to do so. But, as I stated, if no chip is required, don't you find it odd that G27 is completely supported on PC on an outdated driver but cannot be on PS4? And, how can you be so adamant that, those without the chip will continue to work in a year or two or five after we already witnessed how PS3's 3.50 update affected other peripherals?
As a G27 owner this is not something I just decided to post about. I have supplied you with links throughout to every of my sources, and none of them were links that don't work, nor were they marketing blog oposts from the hardware manufacturer in question. And I'm studied in this BECAUSE I own a G27 and initially wanted the game on PS4 and was basically forced to purchase on PC due to lack of support.
I guess we'll agree to disagree.