There is a difference between seeing trends and proclaiming "x86 is dead". The trend is clearly pointing to more ARM in high performance computing environments. Saying this isn't saying "x86 is dead". You're being overly dramatic....and the “doom & gloom”, “x86 is dead”, and “ARM will win” continues on this forum.
Just a while ago, no one thought ARM can even compete in the laptop space. Yet, Apple is about to blow the door open with their in-house ARM CPUs. Apple is planning to scale ARM all the way to Mac Pros. And Amazon's Graviton itself is extremely competitive in perf/cost and it's only a second-generation product.