This article is a wall of text spreading fake info. The sleep states work fine in windows if you have any idea how it works. And this has been the case for at least 8 years.

If you have any issue go into cmd type powercfg -requests and windows will tell you what is keeping it awake.

And doubling down if you really want your pc to wake if its off and you slap your keyboard just tweak your bios wake options and done.