Should setindex(x::AbstractArray, v, i) support arbitrary indices?

[tkf]

https://github.com/JuliaDiffEq/ArrayInterface.jl/blob/c8513cbc0b9dc24e6674206255838abec553b854/src/ArrayInterface.jl#L22-L26

Why not remove type restriction from Base.setindex like this?

function Base.setindex(x::AbstractArray, v, I...)
  _x = copy(x)
  _x[I...] = v
  _x
end

[ChrisRackauckas]

yeah we should. We should also specialize lower dimensions so it's not assuming mutability, or at least specialize on Tracker.