The real answer is probably because Microsoft doesn’t like giving away server features.
Per the article, it sounds like it could be flaky:
The registry trick came with caveats, though. Third-party SSD management tools like Samsung Magician and Western Digital Dashboard were not compatible with the new driver, and BitLocker could trigger recovery prompts after the driver swap.
Server comes with way more tools than windows 11, anyone that could just use windows 11 as a server is probably already doing so. (Although probably still on win10 or 7 most of the time.)
The real answer is probably because Microsoft doesn’t like giving away server features.
Per the article, it sounds like it could be flaky:
I read the article. Are they afraid server customers are going to buy cheaper home editions of win11 instead?
Since all unactivated Windows dies is complain at you, it doesn’t even need purchased, does it?
Server comes with way more tools than windows 11, anyone that could just use windows 11 as a server is probably already doing so. (Although probably still on win10 or 7 most of the time.)