Here’s our situation:

• I work 25 miles (40km) away, and transit would take >2x as long as driving
• we like road trips

So, I have a commuter to get to/from work because transit takes too long. We have a family car for going on a yearly road trip. We used to have a single car (I used to bike to work), and the only thing keeping us to two cars is that commute, but I like the company and the team, so I stick with it. But maybe we’ll drop back down to one car when I change jobs and no longer need the commute.

To me, that’s pretty reasonable.