I'm sure most everyone here knows about cost/benefits and the concept of diminishing returns. I always thought it was funny to see a 50 lb overweight guy at the LBS, willing to spend and extra $1,000 on a bicycle to save 2 pounds, lol. I was an engineer so I'm very value oriented, some would say cheap. I'm happy with my 2 e-bikes which cost about $1,500 each. They exceed my needs. But I also know that half our our economy is based on wants, not needs. Hence the $1,000 iphone, $100,000 range rovers, etc.
I would be very hesitant to spend over $2,500 on an e-bike today as the technology is changing so fast. But I also know that cars/boats/motorcycles and now e-bikes ... they are like catnip to men. For me, I'm very happy with the cost/benefits of my $1,500 e-bikes