The irony is that Microsoft never supported NPAPI in Edge to improve security, and left NPAPI in IE11 indefinitely so any business (which is millions) stuck on

The irony is that Microsoft never supported NPAPI in Edge to improve security, and left NPAPI in IE11 indefinitely so any business (which is millions) stuck on NPAPI are left using IE11 for many years to come (Java Applets, Flash, ActiveX, etc). It is one of those decisions taken with the best possible motives, but that will have massive unintended consequences and keep IE11 on life-support well into the 2020s.