That I do not know. Did several leave? Back when I knew BMW took very good care of their engineers working development. From carbon fiber to recyclable body panels, floor mats and upholstery to more traditional stuff BMW seems to have always experimented, through many of those were more style than substance.
The descending doors on my Z1 were replaced a dozen or so times under warranty, several body pieces (recyclable plastics in 1989!) were replaced. Fir all that it still was worth more than I paid for it ten years later. They only made 3,000.
The i8 is destined for a similar fate, though I'll wager the i3 will vanish just like the early M3 convertible (they bought mine back under Lemon law) and the first new generation 7 series.
I do admire some things about the group, but quality control seems even less consistent than Tesla has shown, but without Tesla customer service quality.