If they actually move as fast as Trump has promised to, the next four years are going to be absolute chaos. Anything that relies on federal funding will be mired in uncertainty - 23 million people work for federal, state and local governments.
Edit - not to mention the tens of millions more who work for contractors and consultants who have contracts with federal, state, and local agencies
Yeah, like the alarms from the proximity sensors on his front bumper when he rear ended that person at "well over 70 mph".