he prediction is that in the end expertise with building hybrids will help traditional manufacturers no more than hybrid steam/sail technology from sailboat manufacturers helped them when steam got good enough.
Now I find that very surprising. I'd expect the experience gained with battery technology, regenerative braking, et al. from the development of hybrids would be essential stepping stones to all-electric. But, you seem to be saying that maintaining the internal combustion baggage in a hybrid limits a manufacturer's ability to grok an all-electric design and therefore hinders their ability to develop an all-electric vehicle. Is that a fair summary?