I spent 6 weeks traveling around Southeast Asia (Thailand, Cambodia, Laos, Vietnam), including several days in Bangkok.
I ate a metric ton of durian, jackfruit (my favourite), mangostein, lychie, and so forth.
I never noted any negative durian odour, and I just assumed that "it must always be fresh in Southeast Asia", and any reports are based on stale or older fruit after it's travelled internationally...