Driving to work is definitely the key for sure. But for me there may come a day that flying 2 or even 3 legs a day NB domestically will get old. I see it with some Denver folks. Take a bid to SFO or LAX WB, do 2 or 3 trips a month, Hawaii, Austrailia, Tokyo, etc and done for the month. Just nice to have options IMHO.

Cheers!