It is both scam and unreal, because chain analysis is a scam itself. As soon as a transaction is made, you can't tell if the coins have changed hands. Moreover, if a criminal mixes their coins with innocent people, you have to either treat them all as "clean" or all as "tainted", given they are part of an unbreakable coinjoin. Deeming everyone involved as criminals is an irrational logic.
So is the whole concept of "lost coins." They decide on the time that has to pass which is arbitrary and if the criteria is met the address is considered lost. It can be 2 years or 5 years, or whatever. I have addresses with coins that haven't moved for over 5 years and also had no inflows. That money is lost according to blockchain analytics

Coins will always get mixed because there won't be a time where every single exchange and centralized business checks deposits for taint. It will never work with or without mixers. The difference is that without them they'll have to allocate less resources to track the same transaction, but why should we make it easy for these companies and governments. I feel like the harder for the government is to assault my privacy, the better.