Does the most time-consuming task to do in Unity for you: Revert and apply large selections of prefabs (Something Unity does not have by default...)

MiscEditorTools.cs

//EDITOR SCRIPT
//Put in an Editor folder

using UnityEngine;
using UnityEditor;

public static class MiscEditorTools {
    //Useful to revert changes to all selected prefab instances in the scene editor
    [MenuItem("CustTools/Group Prefab Revert")]
    public static void RevertGroup () {
        //Get every currently selected gameobject
        GameObject[] selection = Selection.gameObjects;
        for(int i = 0; i < selection.Length; i++) {
            //Be sure its actually a prefab before we change it
            if(PrefabUtility.GetPrefabParent(selection[i]) != null) {
                //Reset it, aren't editor utilities nice?
                PrefabUtility.ResetToPrefabState(selection[i]);
            }
        }
    }

    //Useful to apply changes to all selected prefab instances in the scene editor
    [MenuItem("CustTools/Group Prefab Apply")]
    public static void ApplyGroup () {
        //Get every currently selected gameobject
        GameObject[] selection = Selection.gameObjects;
        for(int i = 0; i < selection.Length; i++) {
            //Be sure its actually a prefab before we change it
            if(PrefabUtility.GetPrefabParent(selection[i]) != null) {
                //Editor utilities are suprisingly useless here
                //Get the selection's gameobject to get the prefab root
                GameObject instanceRoot = PrefabUtility.FindRootGameObjectWithSameParentPrefab(selection[i].gameObject);
                //Get the parent of the prefab root
                Object targetPrefab = PrefabUtility.GetPrefabParent(instanceRoot);
                //Replace and update connected prefabs since we can't just simply 'apply'
                PrefabUtility.ReplacePrefab(instanceRoot, targetPrefab, ReplacePrefabOptions.ConnectToPrefab);
            }
        }
    }
}