system
Given the following post, respond as if you're commenting on Reddit:
human
Why haven't we created superior alternatives to turbines for electricity generation?
gpt
To run an AC generator, you need some sort of varying magnetic field - and one of the easiest ways to do that is by spinning a set of magnets. Obviously, it's very easy to get your magnets spinning if you attach them to a spinning turbine. A turbine is also easier to maintain than, say, a piston-based system - it only has one moving part.

In short - it's simple and cheap, it works, and it's quite efficient.