Danny, not trying to evade the answer ( whatever you think it might be), but the question itself perhaps is impossible to ever adequately answer for other appraisers en mass, let alone for oneself.
For residential RE, the MV opinion definition hinges on a well informed or well advised buyer or seller. Do you think a buyer, purchasing from afar, looking at photos and an overhead map, would make the same purchase decision as if they really know the area? We quite frequently see out of town buyers choosing differently or paying differently than local buyers. I believe even educated appraisers could fall into that same dilemma when they attempt to appraise out of area relying on overhead maps, photos and data,
Though a personal inspection would help , it is preposterous to think that for lender work they would send, or pay for, an appraiser to go far away esp to other states /regions simply to do an ordinary SFR assignment.
The trying to get it right appraisers whether they visit personally or not, would carefully look into many local aspects and do research and make lots of calls , while the volume fast appraiser would stick in any old comp and make any convenient assumption. since appraisers run such a wide gamut between the two, how can this question be answered , especially since the rote pump them out appraiser might very well be those who respond sure, I can appraise anywhere, geo competence is not needed.