I have put about 3,000km on my E-bike in the last 1.5 years. It's limited to 25km/h, because then I don't need a license, it's fast enough for city traffic (mostly in bike lanes anyways) and I get to tow a trailer for my kid. Biggest advantage: Hills don't exist for me. We live in a city with quite a few hills and day care is about 70-100m below our appartment. Doing this trip twice a day with its 15% slope would tak…
I'm from that country with the bikes 'n dykes (The Netherlands) and lately it seems a trend that elder use e-bikes instead of whatever else they were using (car, moped, bicycle, legwagon). They're severely slowed down if they were to use a regular bike. This way, they can get some fresh air and actually see some of nature and adjacent cities/village.
The biggest disadvantage to me is the high price. Combine that with these elder who'd also use these e-bikes to go for longer routes but then they'd not put their bike locked securely (and you should use some good locks). Cause yeah, losing 1-2k EUR from just doing groceries is a shame. They're also a bit more difficult to transport in public transport than a regular bike and more so a folding bike (latter is freely used on Dutch railways called NS).
I also notice that the e-bikes can pass me on longer courses, but if we're going from traffic light to traffic light I accelerate way quicker on my regular bicycle than e-bikes. If I do my best, I can slowly pass an e-biker.
If you wanna take your kid with you, a "bakfiets" (a bicycle with a way to transport items in the front of the wheel see [1]) also works. Especially common in Amsterdam.
The Cube Design Museum in Kerkrade had an exhibition (in NL/EN/DE language available) about bicycles with all kind of bicycles of the past and the future, including experimental designs. When I went, IIRC in september 2017, they also had an exposition about toilets, and a floor about past failed designs (a lot of electronics but not solely), There's World of Bricks (Lego) as well in the Continuum Museum nearby. Recommended! (Disclaimer: not affiliated.)
[1] https://nl.wikipedia.org/wiki/Bakfiets
[2] http://www.cubedesignmuseum.nl/nl/blog/persbericht-fietsen-v...