Hello from the West SF Valley sprawl of So Calif!
I'm a mixed mode (bike+car) commuter, with a sum of somewhere over 4000 miles on all my bikes (two Dahon folders+an Xtracycle comfort bike conversion+an inherited RANS Stratus).
Wife and son also have foldies so we can all drive to social rides that would otherwise be beyond our range by public transit or biking it all the way. If you have a spouse and-or child or children who might not be as passionate about cycling, from my experience I find it sure helps to be able to single handedly get a car ready to go, loaded with 3 folding bikes, in 5 minutes.
My favorite bike (Dahon Speed TR, with the SRAM Dual Drive 3-speed internal gear hub + 8 speed rear derailleur) is starting to give me quizzical mechanical issues, but that's for another post.
Regards from Ov3rTheHill