Full tinfoil hat time:
If op is right they're most likely switching to digital through the use of a preaching app allowing the recording of time, visits and note keeping as a great provision in ministerial crusade. This app will either connect to the KH's master server which reports back to hq or just simply sends info directly to the hq (much like how sir82 mentioned). Possibly allows for more nebulous numbers and reports during conventions as the reporting numbers could be falsified easier or just mushed together into a generic reporting overview.
It would allow ez record destruction too since all they'd need to do is shoot out an update the wipes notes with a little patch disclaimer saying that the change to a new version unfortunately couldn't carry over previous information or something. While that would be terrible for keeping information it certainly gives more immediate control, which if the GB is as inscincere as many make them out to be, that would be the main draw. Hell even going as so far as making a lite publication app and instead of full literature carts they only carry a small amount and go full digital, encouraging people to download the publication app that gives easy access to the latest news, awakes and those Caleb and Sofia videos those kids crave!
I know there's an existing app but adding one that is for casual masses rather than the full resource with an even more spoon feeding interface makes a disturbing amount of sense to me. Afterall they do have their online personal study thing which is so pared down that anyone can follow along.