I understand about the warranty , but I bought the Prius for two reasons,#1 was because its green #2 is milage (save fossil fuel)
so if this Co. (edrive) has a better idea and it works, we should all look more deeply into it. Not saying go right out and modify your Prius now but follow the results for future reference.
Or, buy next years hybrid from "whoever" The manufacturers now know that what the buyers are seeking is gas milage savings. Imagine what they can do if they cut back on some of the "green" like the fuel tank bladders which have come under constant criticism, and the constant desire to keep the catalytic converters hot, for emission control. After all, Honda does neither. The "ICE" would remain off until you exceed 35 mph and you would not need the "EV" mode button to bypass the emmision standards set by Toyota for the US.
I have seen a bunch of companies that have web pages that are planning to make conversion kits of Prius to become plug-in but nothing yet for public. I would not mine paying up to $3k for a 60-mile range before it goes into normal operations. Anything more than that and I would probably pass on it, definitely not $100k.
With a plug-in I could plug it in at work for 9 hours. With only a 17-mile commute pluging in at work and home I would hardly use any gas.