Yesterday I was out a run in the car, three bikes came up behind me, first was a VFR 800, blinding headlights next a Vstrom 650 2017, OK light, not great but OK, next a Vstrom 800re, very poor, looked like a wee 125 or something. I could look right at the light in the rearview mirror no trouble.
Now I've not riden an 800 so to the rider they might be OK but for other road users to spot you I'd say that's the worse big bike I've seen.
If I owned one I'd fit some spotlight just to make it more visible.