Looks like I forgot the sarcasm tag...Alphanumeric encompasses uppercase, lowercase, and digits. “Symbols and anything else” just means punctuation. So throw in a comma or some such - search space goes way up. But I’d hardly describe alphanumeric (upper/lower/digits) as “so insecure”. 62 symbols is a huge improvement over 10. The big thing after you get past digits-only, is to use sufficient length.