"We have replaced the old UI with a new UI. You're going to love the new UI, we promise! But, just in case, you can still have the old UI."

"We notice you're all still using the old UI and talking about how bad the new UI is when it's actually great! You don't need those features that aren't accessible from the new UI anyway. We're going to default everyone to the new UI now and you'll have to manually change the setting back if you want to."

"Ok you're all still using the old UI, even though the new UI is obviously better, so we're going to turn off the old UI at the end of the month"

"Oooooops! A bunch of people said they'd stop paying us if we turned off the old UI so we will now keep the old UI on until the end of the year"

"The Old UI is gone now. Where did all our customers go?"