My simple Intel J5040 with LE13 DV boots from remote.
Same for my NUC11. USB can wake from S5 state. A trait shared by many NUCs but by far fewer mini PCs. Some of them can boot through HDMI CEC, the one that supports that out of the box. An USB CEC adapter doesn't work because the USB, in S5, receive no power at all (in the systems that don't support booting from USB event, that is).
With power absorption on these boxes, though, I doubt that booting from S3 (standby) could be a real problem for anyone.