The Slate and Fathom are going to sell like hotcakes in the US.
Everything that's cheap will sell like hotcakes, but that doesn't mean the companies selling them will make much profit from them.
I have a slate preorder but it's a niche vehicle. It's a small 2 door 2wd pickup that can't meaningfully tow and has a 200 mi range.
It's not going to appeal to people who want a truck as a symptom of fragile insecurities around their masculinity and that's a biiiig part of the US truck market
I think the Fathom will outsell the Slate 10 to 1 despite costing more, because U.S. buyers have adapted to "luxury" in every trim level of vehicle. I mean, yes base level Corollas still sell quite well (but these days even those have features you dreamt about in a luxury sedan not too many decades ago.)
The Slate represents an ideology that combines the nostalgia of what trucks used to be (especially the Ford Ranger) with a modern EV powertrain, but most people don't actually want the stripped down basic vehicle, even if their eyes light up over the idea.