Do you want suspension on your triathlon bike? Sure you do, here, trust this weird arm to not fail catastrophically
Picture courtesy of wikipedia which has the bonus of a suspension bicycle stem. These were also tried in the MTB Scene in the 90s and have fallen out of favour for, quite honestly, sucking ass, but they're coming back now for the gravel trend where the 40mm of travel on an otherwise rigid-forked bike suddenly makes sense again
I doubt that they'll be successful now that "gravel specific" short travel suspension forks are becoming a thing.
I think there's a market for retrofitting it on your rigid-forked gravel bike or such. Way easier to swap a bicycle stem than a fork