Most devices still support S3 sleep, it's just disabled by default as s2idle (modern standby) has become the default. You can almost always re-enable S3 sleep if you really want to, but on modern devices it typically only takes a few seconds to resume from S4 (suspend-to-disk) which technically is safer and more reliable. Also you can always use suspend-then-hibernate if you really want fast resume during the day, but long battery life when it's more than an hour or so.
replyI don't know what "most" in your case means, but pretty much none of the new laptops I've seen have S3 support available in their UEFI. And even if you somehow patch it in, the peripherals don't have drivers anymore that would successfully resume.
replyDunno about other manufacturers, but Thinkpads removed S3. Stock BIOS on some T14 G3 had S3 had it, but it was removed by subsequent BIOS updates.
replyThe notebook market is dead for me if the notebook can't sleep on 0.3% battery per hour and if it can't wake up within a second or so.
So far only macbooks and >5 years old Intel notebooks can.
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replyModern devices generally do not have s3 anymore
replyMy Thinkpad p16s does not have s3 sleep. And s2idle lasts for a couple hours before it dies because every device has to sleep before it goes to true idle, but can never get all the USB devices to sleep. It's crap. S3 worked fine and was robust.
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