Nano Foundation was able to pushed v21.3 out quickly and with v22 coming out very soon to particularly address the spamming issue. CPS is going back up. The unchecked blocks have gone way down today, as many nodes are upgrading to the latest update.
At the end of the day, the spamming attack is good for Nano. How many cryptos can really withstand 500 TPS and not completely fall over? To able to handle that high of TPS while remaining fast and feeless is uber ambitious and I think they are that much closer to that goal after overcoming this attack.