Honestly, I don't know that I'd be knocking down the door today to move from 2017 to 2019. Mostly, 2017 is just working great. Mostly, 2019 is an awesome upgrade, but unless there's a particular piece of functionality that your business can put to work, I'm not sure I'd charge down the path for an upgrade.
However, that said, the one piece of functionality that might make me change this Accelerated Recovery. That might do it. It's a hill I'd be willing to die on. It could radically change your Recovery Time Objectives, making your systems much more resilient in the event of data loss, disaster recovery, all the rest.