I commute 5 days per week, 30 miles round trip per day, 55-60 minutes each way.
I have a flat ride, half on paved paths, half on the street. My work does have showers.
Mtn bike, 2 panniers, I carry food and clothes for the day and a laptop, 60+ lbs fully loaded.
No traffic jams, which is nice, but you need to stay alive, be visible, and watch out. I was hit by a car 3 years ago while riding in a bike lane.