In 1990 I got a bike (Miyata Triple Cross) and started using it for my daily commute. I started leaving my car parked at the office, so that when at home I only had the bike and so also used it for much of my grocery shopping and trips to bookstores. This all worked out great, although I initially had a problem with spokes breaking on the rear wheel, as I'm a fat guy. I asked the shop to make me a stronger wheel, and they did (48 spokes) and everything was great after that.
That was in Cupertino, California. Then in 1992 I moved to Seattle, Washington to a place on the low side of the U-distract. I got on my bike, took one ride around the block, and learned that while fat guys on bikes might work out fine in relatively flat Cupertino, not so in Seattle. That once around the block felt like it almost killed me. The bike has been in the closest/shed/garage ever since.
An e-bike sounds like it would have been perfect. Let it do the work when I need to go up hill, and let me do the work when I'm going across the hill.
(Now I'm across Puget Sound from Seattle. It's not flat like Cupertino, but it is not nearly as un-flat as Seattle. I've pulled my bike out of the garage and am trying to get it back into riding shape. I'm pretty sure I'm significantly under my Cupertino weight, so I think I should be able to find plenty of places to ride).