It was and remains an issue that weighs on me, especially as my POV character is from an unashamedly imperialist tradition, so I sometimes feel as though I am on a tightrope between anachronism and racism every time I bring in other cultures. At the same time, I am uncomfortable about the general lack of characters of color and different cultural traditions in mainstream fantasy and sf.
My gut feeling is that it is better to appropriate with respect than to ignore. I would rather take my characters to China and Istanbul and Africa and make mistakes and get corrected for them than confine myself to the safe Western European sandbox and pretend the problem doesn't exist. But at the same time, choosing to go play in other people's sandboxes makes it incumbent on me to be open to that correction, and to do my best not to be defensive about it.