Over on the Tiger Explorer forum there's similar threads discussing the reasons for choosing an Explorer over other bikes, including the GS.
Predictably there are more folk who are simply moving from another Triumph, but there are quite a few who have traded in their GS, or just kept it, and bought an Explorer.
The majority of them still rate the GS as an excellent ride, but just fancied a change... I'm in that camp .
It's extremely unlikely I'll take a 12k bike offroad, so the styling and oomph does it for me. I don't need to have gone from here to China offroad to have had an adventure.
The last time I took a GS off road it was warm and dry, and my 09 SE ended up nearly upside down in a hedge ... took some getting out as I was on my lonesome
Will stick to roads from now on