At some point in the future, people doing reviews or summaries, describing the history of certain series of laptop models will quote the 6th generation of X1 Carbon as this special one model that got everyone pissed because Lenovo has decided to experiment with suspend for no good reason and refused to make it work properly.
S3 is there - we know it's supported by hardware and firmware. It's just hidden from the user and the system. One simple fix to the BIOS and everyone will forgive you. People will stop returning their X1 6ths, getting refunds and moving to other vendors. They may even consider buying your hardware in the future.
Seriously, I love the looks of ThinkPads. I love their non-curvy design (every other brand tries to make their laptops look like MacBooks) and the fact that in most cases they use components that work well with Linux. But right now, once my current machine is old enough, I will be considering a new laptop. And it's not going to be Lenovo, since it seems to be so very hard for Lenovo to make their flagship laptop right. What is more, I am not going to recommend these laptops to anyone. In the company I work for, when selecting machines for developers, we will no longer consider Lenovo laptops. Which so far has been an obvious choice. We will be looking into other brands and choose one that causes us fewer issues. Unless of course this X1 Carbon 6th edition poopstorm gets sorted out.
I know Linux users are a tiny percentage of your users, so losing that demographic is not a huge deal. It might even be beneficial - you can concentrate on Windows users and their issues. This is business and I totally understand that. I'm just honestly telling you what I think and feel as a user, and what consequences all this has for me and the people around me. It makes me sad and a bit angry, but I have no power over you.