scores reset if a player changes his name

I found this "article" and wanted to know if the method is still valid and if there's any better ways of doing this https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.reddit.com/r/MinecraftCommands/comments/1cu1prd/wiki_update_restoring_scoreboards_after_changing/&ved=2ahUKEwjz4bXyuOaHAxW8iP0HHYf6BpsQjjh6BAgSEAE&usg=AOvVaw1sOu36LnK4uiUTz5dh4Uzg