Apple PC
Did Linus miss the Intel announcement that Apple will move their PCs to ARM 'by 2020'.
Yes, ARM in the data center has multiple false starts but there are now companies with 10's of billions of dollars investing in ARM everywhere.
Delays in Intel's migration to 10nm and 7nm have cut much of it's lead and shown it is no longer invincible. It would be a fool who would say x86 days are numbered but nothing in the history of technology lasts forever.