I remember learning Japanese in the early 2000s and the fun of dealing with multiple encodings for the same language: JIS, Shift-JIS, and EUC. As late as 2011 I had to deal with processing a dataset encoded under EUC in Python 2 for a graduate-level machine learning course where I worked on a project for segmenting Japanese sentences (typically there are no spaces in Japanese sentences).

UTF-8 made processing Japanese text much easier! No more needing to manually change encoding options in my browser! No more mojibake!

On the other hand, you now have to deal with the issues of Han unification: https://en.wikipedia.org/wiki/Han_unification#Examples_of_la...

I live in Japan and I still receive the random email or work document encoded in Shit-JIS. Mojibake is not as common as it once was, but still a problem.