Okay, I bought one of these and I've been using it on and off for over a month. And I think I'm a convert.
We've got a lot of country A and B road, with tall verges and hedgerows. The light casts a yellow glow onto unlit roads, and also onto the nearside adjacent hedge/verge. Hard to say whether that's effective in reducing SMIDSY moments, but hypothesizing that it will do seems fair.
When I'm bimbling along in the quiet and the dark, I quite enjoy seeing what's in the hedgerows too.
The light does have flashing and steady modes. Needless to say I don't use the flashing mode as I think that could be confused with indicating.