If you are going to be a lost continent it really helps if you have a good name. Atlantis just sounds good. There have been hotels and submarines named after it. Mu on the other hand suffers from a bit of a PR problem. It doesn’t help that the last real work on the subject was done almost 90 years ago.
Thankfully there are people like Jack Churchward keeping the knowledge alive. If the name sounds familiar it’s because his great grandfather James churchward wrote the definitive work on the subject. The original books were released in the 20s and 30s at a time when exploration and lost civilizations were front page news. Jack has taken the original Lost Continent of Mu, updated it for today, and continued with his great grandfather’s work.
I haven’t read the book but I applaud the effort to keep both the knowledge and a family legacy alive and well. Check out his books and several podcasts at his site.