When looking at a complex canvas - my first instinct is to group this into sub-modules (e.g. "/load Data"; "clean data") to make this simpler to understand.
We mostly do this through the use of Containers.
However - it would be more useful if you could then take an entire container and convert this to a macro. This would be very similar to the way that Visual Studio allows you to take a block of code and convert it to a sub-procedure.
This would be a super-quick way to allow people to make canvasses more maintainable and easier to understand and test!
Thank you
Sean