(Skip to the end for some HOPE!)
I sure hope they don't discontinue it, not for my sake, but for those who don't own one yet. I am 2 for 2 in having someone test ride the Domane+ HP and then proceeding to buy an electric road bike. Unfortunately they both bought a Specialized Turbo Creo. And they did so after my strong sway to buy the Domane+ HP. First, it didn't help that you couldn't find the Domane+ HP in stores. I figured my test ride would help them order one into the shop (when you could still do that). It wasn't about the cost, as the Creo was the same price range ... and in my opinion less bike for the money. They now ride with their phone strapped to handlebar, which I think is ridiculous to not have a dedicated display at this price point. But, they were in the showrooms, and they look a bit sleeker. Was it that they were shiny and glossy? (I think the matte charcoal is the coolest thing).
Now I go riding with my friend and he can't keep up as I am a bit more fit, and he has the less powerful bike ... but still the Creo is a great bike too and I'm glad both can continue to ride now they have gone electric.
Now here, maybe, is a good sign. I have attached a Model Year 22 electric bike sell sheet I just downloaded from Trek website and it includes the Domane+ HP.