The main reasons why I haven't taken the double bass pedal plunge are:
1) I haven't felt the desire yet to go that way. The styles of music I play don't "NEED" a douple bass pedal, and I don't think I've really exhausted the posibilities with a single pedal yet, and I use the Hi-hat in most of my playing.
2) Given a choice between buying a double pedal or putting the money towards a cymbal upgrade, I'd rather upgrade cymbals right now.
I agree totally with you, Churchdrummer!
Also, I do not want (even) more gear to haul around.
For me, with no roadies helping me, I am happy with my (I know old fashioned) single pedal.
I have played both double bass drum and double bass pedal for an amount of years. I choose not to play either anymore. There is nothing to a double pedal most times it actually lightens your load. But over the years I have become increasingly focused on the pocket. Pocket is just my personal style of playing.