Re: Oh dear
It depends, a lot of servers today are virtual. You have dozens of virtual servers running on a hypervisor (VMWare ESXi, Microsoft HyperV, KVM, Xen etc.). For that you need a fairly meaty server and ARM just isn't there, with the raw power, yet - at least not in numbers, there are a couple of manufacturers making big ARM server chips, but they are up against AMD Epyc and Intel Xeon Platinum designs.
I have a Rasberry Pi at home running as a DNS server, but apart from that, I haven't seen a bare metal server in several years.
At work we currently have a 3-way VMWare cluster at each site running all the servers we need on top.
Hosting is often the same, dozens of clients running on one physical server.
I think it will come, eventually, but at the moment it is still niche, because of the power/performance ratio. If you need a low powered, dedicated server, there are some options, but for most businesses, they want the most bang they can get for their money.