Compositor nodes don’t copy from file to file
PROBLEM
Now Ctrl+C - Ctrl+V works with compositor only in same file, If you want to copy some compositor nodes from file to file, you can’t just copy-paste it. Only append group or scene, and when get access to nodes.
This is not only the case for Compositor nodes but for all kinds of nodes (Geometry nodes, Shader nodes).
It would make life much easier if we could copy / paste nodes between Blender instances (just like in other node based apps) without having to append scenes or node trees from other files first.
At the same time we can copy / paste complete objects between two different versions of Blender, even from e.g. 2.79 to 3.3.