I totally agree, however, as you might have noticed the article is in Polish. The new name - "Yangon" would have to be spelled in Polish as "Jangon" and barely anyone knows what it is. I've decided to use the Polish spelling of the old name so people know what place I am actually writing about. I hope it makes sense.
RE: Rangun: Azjatyckie miasto ogrodów. Część 2.