but find me a tweet (even the joke ones) that hasn't turned into reality
Any of the Model 3 production estimates
If I build a house, I can will it to my ancestors
What direction are you travelling through time?
The major revolutions of the 19th century happened because people had to physically gather in order to air their grievances, discuss their ideas, and design their plots. Once they had a crowd gathered together, it was literally a step away from marching out into the streets and taking to the barricades. The internet doesn't have that physical organizational power. Keyboard warriors fuming away at their desks are relatively harmless. Sure, you might get few lone kooks who shoot up a church. But the instant gratification of social media cannot sustain large scale organized action.
https://en.wikipedia.org/wiki/Simpson%27s_paradox#UC_Berkeley_gender_bias
Trying to be happy is like trying to build a machine for which the only specification is that it should run noiselessly.