I have a feeling, the next gen electric WP will be better and last longer. Just like the old BMW WP where the impeller were plastic and come off from the shaft (the shaft spinning but the impeller stay static, thus no coolant pressure).
The problem alot of times, this electric WP shows no sign of failure, else owner can look into that telltale sign.
If I were BMW the major concern is how lately BMW models have begin to look like LExus in driving experience (being bigger, heavier with that notorious numb electric steering). No one will put up with Lexus feel and BMW reliability period.