you can tell i don’t use Wade‐Giles much
« Official pinyin use is controversial, as when pinyin use for a metro line in 2017 provoked protests, despite government responses that “The romanization used on road signs and at transportation stations is intended for foreigners... Every foreigner learning Mandarin learns Hanyu pinyin, because it is the international standard...The decision has nothing to do with the nation’s self-determination or any ideologies, because the key point is to ensure that foreigners can read signs.” »
apparently we have Taiwan to blame for this; the majority of people from Taiwan use Wade‐Giles
[note: for everyday pronunciation‐spelling purposes, Taiwan uses Bopomofo]