Xeon processors are likely to continue to hold a major part of the server market for at least the next five years, regardless of other competing CPUs.
Intel's going to last until it can't maintain its non-mobile market share and margins on chips. They've got a lot of fab capacity of their own. Apparently they're still confident that they can pull off 10 nm architecture, but TSMC is already making 5 nm, and probably has 4 nm coming (perhaps in weeks).
It depends on how the server chips based on ARMv9 are produced starting later this year.
For those of us who are familiar with power consumption in large data centers, the reduced power utilization (which also results in lower cooling requirements) of AMD servers is very attractive especially considering their high performance at that reduced power. Our data centers have more than 15,000 physical servers in them. The cost savings over three years pays for a significant chunk of replacing Intel servers w/AMD. We've done the math.