This applies to three valued logic imho. missing will error when you want to branch, so you would have to do some fixing than.
Maybe * is more explicit in this case (could be taste).
julia> x = [true, false, missing]; y = [true, true, true];
julia> x .* y
3-element Vector{Union{Missing, Bool}}:
true
false
missing
v1.9.0, not checked on older versions.