I think the generators are meant for intentional longer range trips as well. You get the cost savings for a big share of the trip even if you have to use the generators for part of it.
Yeah, could be. The article linked here had very few details on the generators, besides calling it "hybrid electric" which led me to google a bit and found those ranges, but not additional info on how it'll be used. I guess we'll find out mroe when they start flying routes.