Their vaulting system is very good, especially compared to Destiny 2, which just yeets the stuff you bought from the game files xD
But the fact that you can trade the premium currency with other players is chef's kiss. I mean technically this mirrors the highly illegal method called "scrip" since you get paid for your hard work in currency only usable within WF. But I think it makes you view spending money on the game more as supporting the devs than in other games.
On the other hand, no other game embodies "the journey is the destination" quite as literally as WF. I only have a few hours in it but my friend with whom I played this game to no end years ago is at over 7000 hours now... And I just can't hard focus on one game like that.