Hah - something right up my street! Thanks Deuce for starting the topic.
I've no family connections with horses (my parents can tell one end of a horse from another, but that's just about it), but I've been horse mad ever since I can remember. I do ride, and now I own a horse, which is great, but also time (and money)-consuming. Not that I complain!
Always good to see you on the forum, Atali.

IMO, if horses were actually used as transportation (as of old) their (proportionate) "cost" would pale beside that of dogs and cats (in respect to how such are maintained today; NOT as "working breeds").
Regarding Andalusians, I think the breed is still regarded as pure today (with the Carthusian being the best), and I haven't heard anything about them being nearly driven to extinction, though of course I might be wrong (will look up the history). The Lusitano is now native to Portugal, but the two breeds have a common ancestry; they became separated in the 16th or 17th century. They're both wonderful horses to ride. In Spain, Andalusians are often crossed with Angloarabs to produce the so-called "tres sangres" (literally "three bloods"), and these horses, being faster than the Andalusian, are used by the Spanish "vaqueros" (cowboys) in their work with bulls. They're also usually used in doma vaquera - Spanish working equitation.
I'm really no expert on horse breeds. I've spent my whole life riding Quarterhorses and Appaloosas (with an occasional Arabian). I know that Hyland never mentioned the Andalusion "situation", but her books don't go up to the Napoleonic period. So, I was just taking Davis at her word. Perhaps, like the Cimmerian/Cymry thing, she's just plain wrong.
As for horse archery - that's an art. I was lucky to be able to see an expert horse archer (actually Polish :-)) and was quite amazed at the guy's ability. You really have to have an excellent seat and coordination, not to mention control of the horse.
Horse archery appears to require equal amounts of skill with a bow and empathy with a horse. Such is not gained overnight. Thus, what I said about the difficulties maintaining a "horse archer corps"
off the steppes. One has to start at childhood.