The current 1 Series, which isn’t sold in the US, shares a platform with the Mini Hardtop and Convertible, and now there’s the all-electric Mini SE. Internal competition is not what doomed the i1, but rather a general lack of hatchback enthusiasm from BMW’s two biggest and most important markets: the US and China. The US continues to be infatuated with SUVs while China still generally prefers sedans.
However, BMW will not completely abandon the smaller EVs entirely. It has, in fact, the perfect solution that should make buyers in Europe (where hatchbacks are quite popular), the US, and China all happy.