That said, I hate to break it to you, but there is no real question of 'when', or even 'if'. The general public simply does not care, no matter how much abuse they are subjected to by mainstream platform operators.
There will always be a minority who care enough to embrace decentralization, open source, good e2ee, but they are the exception to the vast majority, at least inside the US, who simply do not care enough to change their behavior.
What percentage of Americans do you think would voluntarily, permanently relinquish their own fourth amendment rights for $5000? Scary thought experiment when you recall studies that have found only two thirds of Americans can name all three branches of government, or that fewer than one in four can name any right secured by the first amendment other than freedom of speech.