"Alfalfa is the King of Forages"
For people raised in alfalfa country, these thoughts don't apply to you!
In the South, alfalfa is generally imported! As such, most people have not grown up with it; additionally, it is not common or inexpensive! Thus these are the impressions of a hay seller in the south.
Poor people - will take alfalfa or alfalfa mixes any time they can for the added protein they can get for their animals. They will take anything $3/bale or less.
Performance minded people who have been around quite a bit - use alfalfa as a tool. Some horses get it, some don't. Sometimes and certain times of the year, the whole barn may be on alfalfa, later in the year, only part of the barn.
Horse women with 1-2 horses - mostly pets! First words out of their mouths when they come in the barn - "I don't want anything with any alfalfa in it." This comes from several reasons. 1. The preception that alfalfa is more expensive, 2. "it ruins their kidneys", 3. Alfalfa makes them hot, 4. "my horses are all insulin resistant" - high protein must mean high sugar - we cannot feed alfalfa.
BTW - 75-90% of our customers are women and we are very appreciative of their buisness. I am not trying to be derogatory. Interestingly, my daughter is 11 - very much into things equestrian. Likes to read the new "Black Stallion of the Windy Hills" type books. A lot of poor information is in these type books as the author is more romatic about the horse experience than they are a quality horseman. Additionally, the pony clubs often want nearly "tranked" horses for the young girls to ride and preach the anti-alfalfa propraganda to the little girls on these first mounts, and pretty soon you have a whole generation of people with a hesitation towards alfalfa.