I've been around here for a good 5 years or so - I would say the bikes out now that are in the 700wh range from the major brands - those started to hit market in the US around spring 2017 - 3 years on, and that is still more power than most need for 90% of their bike use. There are the niche sellers that are higher powered and selling with batteries approaching 1kWH - that will likely be the next big step. Adoption at this point particularly in the US is only being held back by most people's view of bikes as recreational toys. I'd say we are probably the better part of a decade away from the adoption other markets (Europe in particular) are seeing. I guess I'm just trying to point out that the tech (battery) is already very close to meeting most people's needs, it is just a matter of changing perceptions that is the final hurdle.
Also want to note - I keep seeing BH referred to as if it is an unknown quantity/brand - everyone who thinks this just needs to look at the European market to realize it is a top tier product (not to mention registering on their site gives you lifetime frame warranty and 5yr parts/2yr battery as well). Forks/Shocks/Drivetrain are all comparable across brands, no different with BH/Haibike/Bulls vs Spec/Trek/Giant - the latter of which (outside of Spec) are really actually late to the US market compared to some of the Euro brands that have been selling for the better part of a decade at this point.
For BH, the ATOM X line frame is an in-house, brand specific design (if you check their Euro site that frame comprises a significant amount of their newer 2020 lineup) - I'm pretty sure you don't do that sort of thing unless you are a big player in the market. Compare that with say Rad Power Bikes - somehow they have become the largest US based ebike maker, pushing parts-bin bikes from China. If you compare their specs at $1,500 to what Lenny's is selling from BH at $1800-2500, you'd be picking BH all day long - all you have to do is ride those bikes side by side (...I have owned both!).