I wouldn't count Apple out of the server business for long.
After they have a couple generations of laptop silicon under their belts, there's nothing stopping them from dogfooding a real server macOS for awhile and booting up an Apple Service Cloud.
No special insight into whether they actually will, but it's a natural play.
IIRC the old macOS server had atrocious performance. Building a product that can compete with Linux or FreeBSD for general server workloads is a lot of work. Apple could do it, but the investment might be hard to justify.
There’s also an issue of margins. Apple sells attractive hardware and provides a software ecosystem, and they charge high margins for it. Big server users use a large numbers of servers, and they want a lot of bang for their buck. This is not a game that Apple has historically played very well, nor do I see why they would want to.
Apple is really bad at building products which their leadership doesn't want to use personally. Ping and iAd come to mind, server would be the same.
Yet Apple has quite the powerful chip family. If they were to spin off a subsidiary without the consumer-focused mission...well, that's what I would do!
After they have a couple generations of laptop silicon under their belts, there's nothing stopping them from dogfooding a real server macOS for awhile and booting up an Apple Service Cloud.
No special insight into whether they actually will, but it's a natural play.