I know... I know... "It doesn't protect you from crossing traffic" (just to save someone the effort of posting).
However, if there's someone out there who flys in African airspace in an IRS/GPS-equipped aircraft who doesn't fly offset, he/she has an extraordinary amount of faith - or a similarly extraordinary lack of imagination.
However, judging by the many aircraft I pass in African airspace that are quite obviously NOT flying offset, it would appear that we have a very large number of pilots amongst us who have "an extraordinary amount of faith - or a similarly extraordinary lack of imagination".