Given that the API of some functions in Julia now gives nothing if no sensible output exist, i.e.
julia> tryparse(Float64, "a")
julia> findfirst(==(3), [1, 2])
there was a proposal to create a few ? based syntactic sugar to work with nothing https://github.com/JuliaLang/julia/issues/26303.
If that happens, then the T? notation would be more consistent for nothing than missing.