Because I'm a tinkerer4lyfe, I'm gonna buy the new round one to play. I can pretty easily reassign the haptic buttons and add stalks, so it might turn out to be a neat solution. My only concern is the size. I love the model 3 wheel size and don't want something like the bus-sized wheel I had in my 2019 Model X.
Edit: Also, some of what makes this interesting for modding is
1) radically less LIN translation if someone only wants stalks.
2) it is actually cheaper than a 3/Y wheel from tesla. They charge $1000 for the 3/Y wheel. I suspect they are selling this retrofit at cost, or close to it.