Going door to door will seem increasingly pointless and surely will decrease. One saving grace of the carts is perhaps that it has been preparing JWs for a new era of increasingly ineffective and apparently futile forms of preaching.
Abandoning reporting of time (suggested on another thread a few weeks ago) seems all the more realistic now. And if time goes, then pioneering goes. The work would be slowing down, indeed. Soon, will there be anything left of JW religion?