count_roughness_sockets.py

import bpy

roughness_sockets = 0
textured_roughness_sockets = 0

for node_tree in bpy.data.node_groups:
    if not "luxcore" in node_tree.bl_idname:
        continue
    
    for node in node_tree.nodes:
        if node.outputs and not node.outputs[0].is_linked:
            continue
        
        for input in node.inputs:
            if input.enabled and "roughness" in input.name.lower():
                roughness_sockets += 1
                
                if input.is_linked:
                    textured_roughness_sockets += 1
                    
if roughness_sockets:
    print("%d roughness sockets, %d are textured (%d%%)" %
        (roughness_sockets, textured_roughness_sockets, 
        float(textured_roughness_sockets) / roughness_sockets * 100))
else:
    print("No roughness sockets")