See some discussion from April here: What is the best molecular dynamics analysis library in Julia?
I would also love to hear personal takes on how BioStructures.jl fares/how it could be improved, and am the first to say that it is nowhere near the maturity of MDAnalysis.
Chemfiles is shaping up nicely, and I think provides the only way to load certain MD file formats in Julia.
Recently I put a few analysis tools into Molly, particularly Makie visualisation, though it is still early days there.