I'm actually in a small battle to propose SharePoint 2019 to my company. They want to go to 2016 as migration from 2013 will be "faster" (skipping the upgrade hop). I know that I can make myself heard if I come with some improved security features that are on 2019 but not on 2016. Besides smtp authentication, I am not finding much information.
Do you know if there is an interesting security point I can raise ?