@ai6yr See, despite awful domestic policy, I figured the rest of the world would drag the US car makers along. Research into efficiency of internal combustion engines coming to an end as EVs are adopted worldwide, and that investment not worth it for just the US market. Car makers switching to unified platforms and I (reasonably) assume those are broadly global to allow selling cars as widely as possible with as few tweaks as is necessary.
So at some point, economies of scale for EV means you just end up doing that in the US, too. And then for US makers, they're not going to be able to sell their cars where internal combustion is eventually forbidden.
But now I see Kia/Hyundai are pulling EV models in the US. Admittedly, no one seems to be bothered about affordable EVs (Kia's EV6 *starts* at $42k), but still.
I appreciate a lot of this was based on supposition and not actually following policies and what car makers are actually doing.