Trinity Force Combine Cost Is Still 78 Gold

One of the components received a cost reduction of 75 gold, so the old 3 gold upgrade cost became 78. I doubt they have any intention of making Triforce cheaper.

Also I don't believe 3 gold is that important. If you are down the 3 gold you can wait 1 second.

I think "Trinity Force's 3 gold combine cost" is their in-game joke and 78 gold is not really intentional. Just like The Brutalizer's total cost being 1337 gold instead of 1350 or something.

It was a nice little easter egg, and it really supported not having to waste your time with one of the third items if you didn't need it. It may be less so now, but to be honest, there is little reason to change it back.