This is quite understandable. The trek salesman admitted that there has been very little interest in the road e-bikes, but the mountains bikes are selling well. High torque motors are a clear advantage for mountain bikes, but the road bike community is still scratching its head bout e-bikes for several reasons:
1) A casual rider is not going to spend $8,000+ on a road bike. So only serious riders will look at road e-bikes.
2) In the last decade high rpm - low torque "spinning" has become more popular than low rpm - high torque "grinding", and front chain rings have dropped from 52 down to 48 as a result. As a result, having a high torque motor is seen as less of an advantage, and newer e-bikes have much less torque than earlier models.
3) Weight is still seen as the ultimate evil. Buying a bike that is twice as heavy and twice the price as the same analogue version is nonsensical for a lot of road bikers.
4) In the last 4 years, Trek has gone from Bosch, to Fazua and now to tQ (an unknown company). Every time they change vendors, your $10,000 bike is instantly worthless, unsellable, and unfixable. Analogue bikes dont depreciate like that.