Unfortunately, bad patches are something everyone has experienced at one point or another. Just take the most recent example of the Microsoft Windows October 2018 Update that impacted both desktop and server versions of Windows. Unfortunately, this update resulted in missing files for impacted systems, and has temporarily been paused as Microsoft investigates.
Because of incidents like this, organizations are often seldom to quickly adopt patches. This is one of the reasons the WannaCry ransomware was so impactful. Unpatched systems introduce risk into environments, as new exploits for old problems are on the rise. In order to patch a system, organizations must first do two things, back up the systems to be patched, and perform patch testing.