yes I also often see posts like that on this forum but I never pay attention and I only think if it is FUD and think people who say that don't really know ethereum
ETH is great and let’s all focus on that instead of making time to the trolls. This why you have to create your own strategy so when those fake news appear, you’ll know what to do. ETH continues to adopt change and improve their system, so I don’t think this system will be left behind though there’s a chance for a new project to come in but its far from reality as of now.