Before I moved (yesterday), my commute was 33 to 40 miles round-trip depending upon route. That meant only three days a week put me over the 100 mile mark.
I'll get fewer miles now, but I'll ride every day. I just did my first trip into work, and it clocked in at 3.3 miles. Assuming I take the same route home and do it every day of the week, I'll manage a whole 33 miles.
On the other hand, I won't drive at all, and I can take alternate longer routes.