not sure when bc in my eyes, he has that charm that stands out and is recognizable ever since so he's always been famous to me. but during the first few years of debut when taehyun was very active on weverse he always went viral for his smart (he did moas homework) and witty replies , funny humor, and for being an affectionate idol towards moas. he's always honest with his thoughts, isn't afraid to voice out opinions, he's very mature and i noticed a lot of ppl outside moa twt before recognized that, this was around 2020-2021. when he learned how to cook by himself as well and shared the process of making kimchi. during ox1 love song era, what i remember the most is him being recognized because he sings well with so much passion and emotions. then he went viral for being talkative and being a social butterfly even non-moas noticed and also recently he's been recognized for his dancing skills. and nowadays i think more moas are starting to realize how soft and charming taehyun is (he's always been cute) but it's becoming more known within the fandom. there are so many lovely things about taehyun that have always been there since the beginning and the more you pay attention to him the more you'll appreciate them. (sorry anon idk if i was able to answer your question directly but i just listed out some of the things that he deserves recognition and the things he went viral for)