I'm really scared that technology-enabled authoritarian regimes become much more powerful than they used to be.

In the past decade we had some examples where some countries had really big anti-government movements and protests... and they simply couldn't achieve anything substantial. Iran comes to mind, but I think we also had some in the East of Europe.

And then there are countries like Russia and North Korea (and likely many more) where it looks like (at least from the outside) that mass protests are pretty unlikely, because any kind of political opposition is suppressed before it reaches this level.