out of curiousity. The author concludes that these coins are “under fire” and i think he is correct about this one as this is what we all see as well, not? Japan as the very best example.
About transaction histories. Actually with nearly every coin you can use a different wallet adress for each transaction. I can’t see how the “whole history” of transactions for a given person is exposed when someone uses his different wallet adresses and what is recommended anyway?
In the context of new widely used payment system i tend to agree with the author that at the current state privacy coins like Zcash, Monero face problems, hence the -5 he gave. Once the landscap changes this may change as well, but currently it doesn’t seem like it will change soon. But that’s just my opinion and that i agree to the logic behind the authors comment/rating.