XJTusa
I have a better idea than you might think - though I do admit I am not all that familiar with the XR.
Thanks for making my point though - all you need to do now is find a bunch of regional airports at sea level with no obstacles and a 2133 m or longer runway.
Kind of limits the operation a bit....
A fair chunk of the regional airports are in the 1800-2000 m range and a reasonable number have some obstacles in the splay.
Takes the gloss off it a bit in my opinion - as does the cabin size....but what would I know