More likely than not, those servers are at AWS. And if that's the case, once all the components have ARM images the server instances can be switched over to the M6g instance type for significant cost savings.
Even if not AWS, every cloud provider will have cheaper ARM offerings in a few years. The writing is on the wall at this point. Not to mention that some significant portion of the PC market will certainly follow suit, and now whether you’re developing for desktop, mobile, or server, there’s a good chance you’ll be targeting ARM.