I've long wished Labview had native support for Interfaces. Recently I ran across an article describing Traits as a better alternative to Interfaces, Mixins, Multiple Inheritance, etc. Traits are (as near as I can tell) similar to Interfaces with the main difference being Traits can define a method implementation while Interfaces can only define a signature.
I'd like to see Traits implemented in G instead of Interfaces.
(Cross posted to LAVA.)
Available in LabVIEW 2020 and later. LabVIEW now includes support for Interfaces.