Hello eric19312, I think most of us have purchased a mill more for.
1 the convince of being able to get in on bulk purchase pricing.
2 the connivence of having grain on hand to be able to brew whatever type of brew we want on a whim.
3 having the ability to set our crush to our needs=better control/better consistency of our brews, instead of getting whatever the crush happens to be on the LHBS or retailers mill.
4 some of us just like doing every aspect of the brew process that we can.
5 My personal belief on the aroma/freshness of grain crushed right before you brew is its going to make better beer with more flavor and aroma, I look at it like this if you take two oranges, cut one in half and place both in the fridge, let sit for 3 days, then pull them out, which one would you rather eat, one is going to be better than the other.
I think grain is the same as the oranges, but on a much slower reacting scale.
Just my 2 cents and thoughts.
Cheers to everyone thats brews