I've got a Lenovo Yoga Slim 7 which doesn't advertise S3. It's a really nice machine, but having to wait several months after getting it for someone out there who understands these things to come up with the right combination of kernel code and ACPI patches so I could shut the lid and not have it just reset when I opened it back up again was something I could have done without. Fortunately it's got the capability, it just needed turning on.