Probably not. Comments don’t take much to recognize and skip over.
Please don’t make blanked massive changes to anything like that. Change one Thread::sleep to a Timer, then test that it still works. Then move on to the next one. When you make massive changes like that without testing then who knows how many errors you may have introduced or which of the dozens of changes you made is the cause.
I recommend Design Pattern: Gate Keeper to solve this particular problem. Not only is the code more generic it will handling the timing on commands to these devices form all of your Rules, not just from the one Rule.
Also, the nesting of the Timers is not necessary. You can create them all at once and greatly simplify the code. Probably the easiest thing to do is to put the plug Items into a Group, I’ll call it Plugs.
Plugs.members.forEach[ plug, index | createTimer(now.plusSeconds(index), [ | plug.sendCommand(ON) ] ]
All that messy code replaced with a one-liner. It loops through all the members of the Plugs Group and creates a Timer to go off index seconds in the future meaning the first Plug’s Timer goes off at zero seconds, the second one at one seconds, and so on.