It may take a few years to see the effect that the pandemic is having. Will the GB decide to stand pat and hope things fix themselves? Will they take any action to try to either accommodate or intimidate the rank and file, in the hopes of stabilizing the numbers or promoting growth? Past history indicates that they're not very good at judging things (ironically enough), since they are usually a group of old men who are insulated from the real world to a considerable extent.
In the past, it has been their own arrogance and poor decisions that caused the numbers to drop, sometimes drastically. This time, it has mostly been a circumstance that has reduced the effectiveness of their primary recruiting tool. Can they get back to door-to-door preaching in sufficient numbers and dedicate enough hours to recover? Ten years, fifteen years... that's a long time (though at my age, it doesn't feel like a lot!). Lots of things can happen in that amount of time.