Chart of US job openings, quits and hires tells a story

First surprise:  Layoffs are nearly steady over the last ten years with a gentle decline.
Second:  People who quit are usually replaced.  ( Purple line tracks Blue bars well). People who have a job are much less likely to quit nowadays.
Third:  The total of job openings has gone down, way down.  
It seems that businesses aren't shuttering so much as employers are finding ways to increase productivity without hiring new people.

Source: Calculated Risk chart gallery