Nagant is correct, I commute! 15miles a day, or more.
I rode the nexus for about 2 months, when the outside bearing failed. I thought due to rust as I found nothing wrong. I fixed it and put the wife on it, lasted 6 months and broke the same cage......
I have to believe something is amiss with the driver, so I ordered a new one.
I never had that warm fuzzy feeling from it when pedaling, but that could be involved with my problem.
Simple to rebuild, I did clean and regrease, no problems with rusting now!
On used bikes I have scrapped a couple due to rust, most likely were outdoor bikes.