A “full size” fat tire ebike would be remarkably light if it weighed only 60lbs. That would be a commuter with a suspension fork, maybe with fenders, or amongst the lighter folding bikes with 20x3in tires. Fat tire (26x4in or wider) models typically weigh 70-95lbs.

As far as range, most brands exaggerate their claims. Some post their testing method, so you have a better idea of how much you’d get. But estimate 12-15Wh/mi riding moderate speeds (12-15mph) on a commuter, double that for a fat tire model or ride 20+ mph (air drag increases exponentially with speed while resistance from tires, drivetrain friction increases nearly linearly), even more so if you ride a fat tire model at those higher speeds.

A battery’s lifetime estimate is when it reaches 80% of original rated capacity. If nothing has broken or cells have died, that old battery may still be useful to you.

The lower range in winter is true.
I see that myself. My E-bike has normally an range of 80km.
In winter I can get 50km of range. In warmer weather I can reach 80km.
When we sell an e-bike we tell the customer about the lower range in winter.
And that it's better to charge the battery in home in the winter.
It's clear that E-bike are more heavy. They have the motor, battery. And the display. Although the display is just 100 grams.
The motor itself adds about 3kg. The battery can be up to 6kg.

Fortunately, a replacement battery for my e-bike costs about $150-200 USD. Not that I would recommend doing anything dumb w/my bike in the meantime though. Also, e-bikes can be inconvenient to put on bus bike racks given their heavy weight

A 40 mile commute in the USA would take 2 hours, who would commute for that long and that far? Most commutes in cars or bicycles are less than 5 miles...

Mentioning Rad Power Bike as an example is a problem already...

I love to have one, but I love my house more!😆

Motor replacement, 600,to 1000? That's absurd  300.00 for the most expensive motors. My cheap  Chinese e bike I have been riding for 18 months close to 4500 miles and it still  charges up to 54.3 volts out of a possible 54.6. I bought a second battery for less than 200, I alternate using them from week to week and I am confident, based on my original battery that even when I decide to retire my bike and buy another with the same style of battery THAT I use today I will be set. You are way overstating the cost of motors, batteries , and the fact that except for the most expensive examples, a lot of parts ARE able to be used across brands. The only thing that I have in agreement is the range claims that you make, those are in line with my experience. All of the 5 e bikes I have owned  have used Bafang motors, Shimano shifter and derailers Tektro brakes,m chains , lights brake pads can all be bought online.
You must be a tool of the anti ebike lobby. Your information  is extremely biased toward the outrageously expensive that elitists claim to only ride.

It’s 68 degrees today I didn’t go outside except to let my dog 🐕 to poop 💩 and pee

I will NEVER purchase AN EBIKE

1st 1 here 🎉🎉🎉