[Clamchop]

A camera with a swiveling flash (almost always a separate unit) can yield stunning photos in dim indoor conditions. If you have a white wall or ceiling, bam, tons of diffuse light without any more props.

Only available on a traditional camera.

But even fewer people will bother with all that.

[chrismorgan]

You can manually rotate the built-in flash in Sony’s α6000-series cameras: it uses two spring-loaded hinges, and still operates if you push/pull it backwards. This gives a range of motion from full-forwards to full-upwards to somewhat-backwards.