For desktops at least, Wake on LAN is still a setting in EFI/BIOS. On my AMD desktop using a high end ASUS motherboard (Dark Hero), I switched that off along with a couple things that looked like a WoL setting in Windows, and that PC has stayed asleep all night ever since.

I haven't seen this behavior from my ThinkPad X1 Nano, but that may be because it shuts itself down entirely after being closed for an hour or two without being connected to a power source.