Save Toolbar and Edit>Preference Customizations
I spent several hours customizing my work space (toolbars and preferences). Unfortunately, I had to reinstall Acrobat Pro DC. To my dismay, once reinstalled all my customizations were gone and I had to redo them all. There should be a way to save all customizations and implement them should a reinstall be necessary. It would be nice to have them all in one file that could be stored either on my computer or in my cloud account.

-
Andy commented
This comment is four years old, so I guess that says it all. It's a pain to set up the Acrobat toolbars and tools panel, and with no way to save that setup it's even more of a pain.
InDesign finally allows you to export user settings, but at least there was a back door in previous versions to pull various prefs files and rebuild your setup. No such luck for Acrobat.