The article's author writes about having issues in the third year of ownership without describing any unusual actions he might have taken to cause said issues. He had the watch serviced under warranty and everything was fine. The bezel disintegrated and Omega quickly replaced it. Watches are machines that run 24/365 if you wear regularly and need to be serviced accordingly. Some watches go without issue for years, some don't. Omega have done a great job of engineering the movement to last.
The co-axial movement has been around for 20 years. If there was 20 years of failure or losing money or service issues, the watch community and watchmakers would have made the public aware and they would need to change. The fact is Omega is continuing to role out the co-axial movements across almost all model lines. There are PLENTY of articles applauding the movements and a few discussing issues, some relating to claimed service intervals or abnormal wear on certain parts. Omega is the second largest mechanical watch manufacturer in the world and out of the thousands of watches they product, there are going to be some issues. The company and service centers handle customer service and address those concerns.
You've done your research and could probably site other articles about the 8400 movement that were not negative. If not, look around the forums, here, WUS, and you'll see there are plenty of people that enjoy their Seamasters. Some of us have stories of frustration, but that is common among people passionate about their products.
