In the Netherlands at least most of the established brands (Gazelle, Sparta, Batavus) have been selling e-bikes for 15-20 years now with sales really taking off in the last 5-10. Most are comfortable city bikes that use standard bike parts. Battery performance has improved a lot over the years and most models allow you to remove (and replace) the battery. Depending on where you live they may be sold under different brand names. I saw that Sparta is for instance sold as Hercules in Germany.