The currency tab.

[Tint]

2.) Currency tab entries are permanent character entries, meaning in one way or another this is information that needs not only be made available to every single character ever created, regardless of quest progression - this means it also needs to be made in such a way that code (programming) is written as such to make use of those new custom entries rather than working with the variable item formula (i.e. token turn-ins that we have now).

Implementing all tokens ever made into the currency tab would require a lot of excess data to be accumulated per character, which is in the end physical space allocated somewhere and has operational cost tied to it.

Currencies would basically work like achievments. And they add new achievments all the time. If they can keep track of how many enemies you killed, how many dungeons you have finished, how often you have gathered on a level 51-60 node, how often you have finished a specific raid-tier... then they also can keep track of your currencies.