The Forever Stamp- why the hell not?

I had to go to the post office yesterday and was surprised that while I watched more than half a dozen folks buy postage, none of them bought Forever Stamps.

For those of you who don’t know, the Forever Stamp is the same as any other first-class postage EXCEPT it lasts forever (unlike a 44 cent stamp after the next rate increase). You dig?

So, I assume there are only two reasons why people wouldn’t make the smarter economic decision here:

1. They like to have some other image on their stamps (Charlie Brown, State Birds, Norman Rockwell paintings). Forever stamps have the Liberty Bell on them- what the hell’s wrong with that though?

2. They don’t plan on having the stamps that long/they only buy small amounts of stamps. (Think ahead, people- you know you’ll have some stamps on hand when the rate jumps again).

Anyway, this may seem very unimportant or rant-ish, but I’d love to know why you DO or DO NOT buy Forever Stamps and what (if anything) I’m missing here.