Slightly off topic, but the last convention we attended was the 2014 international at Melbourne in a large sporting stadium
The session finished with many "Mexican waves" going around the stadium, along with dozens of large banners with slogans like "see you in paradise" and other corny expressions!
So, as has been said, (frog in boiling water), this gradual change shows that anything is possible.
Who would ever have thought there would be songs with "karaoke" style lyrics on large screens in every venue and Kingdom Hall?