Simple question, yet oddly hard to google: Do they add any latency? Would performance be better than a DVI-D to VGA adapter? I know they have to have a DAC because DP doesn't natively output analogue.

The Amiga didn't have audio on its video connector. It did have both analog RGB and digital RGBI, separate hsync and vsync but also a combined hsync/vsync. And a clock in, to synchronize with external ...