I have a nice long commute, the majority of which is driven. It's unrealistic to ride ~32mi each way, and out on the hills we have here, it'd be murderous. However, I do ride everyday as part of my commute. The parking lot I use is a several miles from my end destination and I take the long way there. About 20 of the 32 miles are interstate so I get there with plenty of time for a nice pace on the ride in.

I'd ride all the way if I lived close enough, but that's financially not viable at this time. If you can do the same, ride part way and drive/use a bus for the rest. You'll get everything you want - not excessively worn out, but some biketime too.