My 5 hard-wired PCs still work. However, there were a time or two where one or two of them stopped responding to WOL commands. The fix was to disable the network adapter then enable it and then restart. This happened to 2 separate PCs.
Never could get WOL to work with Wifi adapters. For those (3), I used Iris Smart Plugs and enabled Boot on Power Restore in BIOS.
For my 2 laptops (MacAir and Dell), there is no solution that I know of.
I can also turn them off via ST, use mouse activity as a presence sensor, open up web pages, start Pandora, WMC, KODI or whatever I choose with a Tutorial I’ve done here: