Because Intel paid Dell and others to not use AMD[0][1]. Dell officially ended their Intel exclusivity 13 years ago when they agreed to sell servers with Opterons[2].
[0] https://en.wikipedia.org/wiki/Advanced_Micro_Devices%2C_Inc.....
[1] https://business-ethics.com/2010/07/23/0901-dell-inc-agrees-...
Big discounts, kickbacks, "deals" and "programs" are being deployed and more on the way.
[0] https://s21.q4cdn.com/600692695/files/doc_financials/2018/An...
[1] http://ir.amd.com/static-files/438f4934-2883-4c85-9193-d5218...
'Big discounts, kickbacks, "deals" and "programs" are being deployed and more on the way.' are generally perfectly legal.
The practices that have resulted in Intel being sued/settling/fined by companies/states/FTC/EU/Japan.
HPE on the other hand tends to be a little more supportive.
And I could only guess there are lots of push from Intel to ask their customer not to offer any AMD machines.
No kidding ;)
"Initial performance studies on Rome based servers show expected performance"
Which is true, but misses the real point.
We're a VMware shop so I'd be hesitant to deploy non-Intel just because I don't want to get caught holding the bag in case AMD can't keep their momentum up for the next 5 years when we'd most likely looking to lifecycle the environment.