Ampere is still the only people making a decent purchaseable ARM server. Not loving the idea of there being a bunch of new debt hovering over them now.
What about https://www.apple.com/shop/buy-mac/mac-pro/rack#
I love my macs but apple will never be a cost or reliability solution to computation unless they do a complete 180. They're a boutique/luxury firm that can choose which markets they want to dominate. If you think there's not a small horde of people at Apple trying to figure out how to pitch bringing the xserve back, I have a bridge to sell you. But unless they can convince CTOs to become sysadmins it'll never be a viable way for a company as large as Apple to drive hardware development.