The article is correct in that Buddha being a prince is a myth. The Pali canon (Tripitaka) does not assert he lived in a palace, depending on the translation used.
It states he was born in bhavana (Sn. 685) which has in the past been translated as palace but it simply means a place. When Buddha talks about his fathers abode he just refers to a house or mansion or family complex, using the word nivasana (A.I 145) which did not refer specifically to a palace or royal residence (vimana or mandira). nivasana was not used to refer to royal palaces until centuries after it was presumably written in the Tripitaka. Buddha also does not refer to his father as a king, but when asked he just said his dad was from Sakya clan (Sn 322,323,324).
It states he was born in bhavana (Sn. 685) which has in the past been translated as palace but it simply means a place. When Buddha talks about his fathers abode he just refers to a house or mansion or family complex, using the word nivasana (A.I 145) which did not refer specifically to a palace or royal residence (vimana or mandira). nivasana was not used to refer to royal palaces until centuries after it was presumably written in the Tripitaka. Buddha also does not refer to his father as a king, but when asked he just said his dad was from Sakya clan (Sn 322,323,324).