All about where you live/ride...

Out here on the coast you can go on a nice morning ride and have a 30 mph headwind all the way home.

Anywhere out of the Napa Valley is a serious climb if not heading for SF Bay. And even for a bay trending route you'll have at least a few miles of hills ... All the roads that are not major highways have steep sections. So if you are in your semi-dressy office clothes and you do not want to arrive all sweaty, an eBike makes a lot of sense