When my office moved downtown 3 years ago, I wasn't sure if I could continue bike commuting. My one-way commute increased from about 10 miles to 15 miles, with a lot of hills and traffic lights in the extra 5 miles. I continued riding and it wasn't as grueling as I expected. However, I am much more likely to drive now if the weather is sketchy because I don't want to spend 2+ hours slogging through pouring rain, thick fog, high winds, etc. We've had a lot of cruddy weather this year, so my commuting frequency is down, but I'll still end up with more miles than ever except for last year.
I'm wondering now how I will cope with retirement, which will be in about 4 years if all goes to plan. It seems like it will be harder to motivate myself to ride 30+ miles nearly every day when I don't have to ride to work.