The following should help. It was written before rule machine existed.
And remember that rule machine was written within the SmartThings environment. It was written by one (obviously extremely talented) community developer using the existing tools. Nothing was hacked or extended. So all of its capabilities still exist in the SmartThings platform, it’s just that rule machine packaged them very nicely. It was a great accomplishment, but its absence doesn’t mean those capabilities are lost as well.