Update to BlackBerry Priv keyboard app brings swipe to type feature
Go to Settings > Language and Input > BlackBerry Keyboard Settings > Tap on Type by swiping. You can then toggle on the feature for either the virtual keyboard, the physical keyboard, or both.
Just a quick word to the wise. If you do enable the swiping feature for the physical QWERTY, you will no longer have the ability to swipe back to delete words. Also, you will no longer be able to swipe up on the touchscreen to see symbols.
Depending on your typing skills, you just might find using the swiping feature to be a faster and easier way to type. If you own the Priv and have never used swipe to type before, you just might want to give it a shot. If you don't like it, you can always toggle the feature off.