Hi all, for those who do not know:
Some heirloom trinkets are not unique-equipped, meaning that for some of them, you can wear two at the same time. This means that you do not need to upgrade two heirloom trinkets if you’d rather save 12500 gold. It also means that an heirloom trinket (that’s not unique-equipped) is probably a good first heirloom to upgrade, you get two slots covered for the price of one.
← example of a character wearing two [Swift Hand of Justice]s. Two for the price of one! Anyway, I thought that was neat as I was a wrath baby and I’ve only heard of trinkets which either came from a quest (so you can’t get two) or were unique-equipped.
I presume this is the case because heirlooms used to be something you bought and sent around as needed, not an item you created as many times as you wanted from a menu. So I guess they let it be a little heirloom perk, you can have two trinkets now for the price of one other heirloom.