Find Missing script recursively on selected Objects and remove them, compatible with the new prefab workflow (nested prefab) tested on Unity 2019.2+

FindMissingScriptsRecursivelyAndRemove.cs

using System.Collections.Generic;
 using System.Linq;
 using UnityEngine;
 using UnityEditor;
 public static class FindMissingScriptsRecursively
 {
     [MenuItem("Auto/Remove Missing Scripts Recursively Visit Prefabs")]
     private static void FindAndRemoveMissingInSelected()
     {
         // EditorUtility.CollectDeepHierarchy does not include inactive children
         var deeperSelection = Selection.gameObjects.SelectMany(go => go.GetComponentsInChildren<Transform>(true))
             .Select(t => t.gameObject);
         var prefabs = new HashSet<Object>();
         int compCount = 0;
         int goCount = 0;
         foreach (var go in deeperSelection)
         {
             int count = GameObjectUtility.GetMonoBehavioursWithMissingScriptCount(go);
             if (count > 0)
             {
                 if (PrefabUtility.IsPartOfAnyPrefab(go))
                 {
                     RecursivePrefabSource(go, prefabs, ref compCount, ref goCount);
                     count = GameObjectUtility.GetMonoBehavioursWithMissingScriptCount(go);
                     // if count == 0 the missing scripts has been removed from prefabs
                     if (count == 0)
                         continue;
                     // if not the missing scripts must be prefab overrides on this instance
                 }
 
                 Undo.RegisterCompleteObjectUndo(go, "Remove missing scripts");
                 GameObjectUtility.RemoveMonoBehavioursWithMissingScript(go);
                 compCount += count;
                 goCount++;
             }
         }
 
         Debug.Log($"Found and removed {compCount} missing scripts from {goCount} GameObjects");
     }
 
     // Prefabs can both be nested or variants, so best way to clean all is to go through them all
     // rather than jumping straight to the original prefab source.
     private static void RecursivePrefabSource(GameObject instance, HashSet<Object> prefabs, ref int compCount,
         ref int goCount)
     {
         var source = PrefabUtility.GetCorrespondingObjectFromSource(instance);
         // Only visit if source is valid, and hasn't been visited before
         if (source == null || !prefabs.Add(source))
             return;
 
         // go deep before removing, to differantiate local overrides from missing in source
         RecursivePrefabSource(source, prefabs, ref compCount, ref goCount);
 
         int count = GameObjectUtility.GetMonoBehavioursWithMissingScriptCount(source);
         if (count > 0)
         {
             Undo.RegisterCompleteObjectUndo(source, "Remove missing scripts");
             GameObjectUtility.RemoveMonoBehavioursWithMissingScript(source);
             compCount += count;
             goCount++;
         }
     }
 }