It's a shame that JuliaDB was basically abandoned. I work in the financial industry, and I could see Julia competing with KDB+. Unfortunately, the Julia data engineering stack is far behind the data science stack.
Thankfully, Dagger is under active maintenance, and has financial support through the JuliaLab (by employing me). Krystian Guliński, the DTable's author and maintainer, is also interested in developing and maintaining the DTable further (having created it as part of his schooling), and will hopefully stay on the Dagger team for the foreseeable future.