Hardly. Data centers are a dying breed, and their number has been rapidly dwindling in recent years. DC (and the mythical «on-prem» by extension) has effectively become a dirty word in contemporary times. The most brutal lift-and-shift approach (without discussing the merits of doing so) is most common: create a backup, spin up a cloud «VM», restore from the backup and turn the server in the DC off forever. No-one is going to even remotely consider a new hardware architecture, not even in the cloud.
Moreover, since servers do not exist in a vacuum and either run business apps or do something at least remotely useful, that entails the software migration to adopt the new platform. And the adoption has to be force-pushed onto the app developers otherwise they won't bother, and for them to convert/migrate the app onto a new architecture, they need desktops/laptops that run on the new ISA, and no viable server and desktop hardware exists in June 2023 – it will come along later with «later» not having a clear definition. Talking open source is a moot point as most businesses out there run commercially procured business apps.