Iphone X has bad review and its sales will be affected.

https://www.macrumors.com/2017/12/05/iphone-x-consumer-reports-ranking-below-iphone-8/

Apple cannot rely on its flagship iphone X to boost its share price anymore because iphone X has a bad review which puts it below iphone 8.  Iphone 8 sales figures are not great and we can infer this on iphone X sales too.