This has been a problem as long as laptops have existed. I had a Dell in like 2006 that I would close and throw in my backpack at the end of the day. When I got home there was a 50:50 chance it would be about 5000 degrees with the fans blasting because it never actually went to sleep.
The fact that this still routinely happens 15 years later despite the insane progress of technology is kind of hilarious.
The remaining 10% are the mac, I suppose? It's one of the better things about macs, and has been working mostly flawlessly for at least 15 years, strange that the other platforms still struggle with it.
There are a few non-Mac vendors that still support S3 sleep mode. I think Thinkpads still work. The problem is that it requires vendors to support it in the BIOS. Windows no longer supports S3 sleep mode, so vendors aren't willing to add that feature just for Linux users.
My 2019 Intel Mac Pro is really flakey about actually going to sleep when I close the lid. It seems to require me to reset the PRAM occationally to get it to work again.
I'm glad they moved to their own chips because these Intel Macs are the worst hardware I have ever owned.
My Thinkpad works fine under Linux, I didnt need to do anything to get great battery life and perfect sleep.
For what it's worth, my MBP is also a coin toss if it manages to get to sleep or not. Oftentimes even if i explicitly click Apple -> Sleep it just flashes and stays awake.
