I'm sure everyone here still keeps dead coins in their wallets to this day because we really can't do more with dead coins in our wallets, even though there is a dex platform for coin issues, but if we look at the high fees on ethereum then it will only be a waste to sell the coins and it is better to leave the coins as they are because they will never get any development from the coin owner.
it seems that all those who have been in the business for a long time can be sure to get a lot of coins which, when received, face many problems, from those that have no value or coins are no longer developed and the exchange is no longer active and many other cases.
old coins are still a lot of erc20 and we know that the problem of high fees as you said has indeed occurred, resulting in sometimes costs being higher than the value of the coin itself. so many don't want to look anymore and just keep quiet, because it's not profitable other than that there will be a surprise price hike and costs will drop again.
fees are the main problem why there are still quite a lot of dead coins in people's wallets. considering holding dead coins in our wallet is still better than paying $3 to $10 to make dead coins out of our wallets. In addition, although the opportunity is very small, many people still hope that the coins they hold have a price in the future.
always really hope for a surprise, that a coin that has been in the wallet for a long time can increase in price because it can be from increased bitcoin or there is a surprise like coin doge.
although I agree with you that the possibility is very small, there can be fundamental changes, but there is always a possibility that it could happen. but hope like this is certainly meaningless too, because it is very unlikely.