I have to agree with Inanch-Bilge again - while composite reflex bows were generally harder to manufacture (making such a bow could last from a few weeks to a year, or even more if it's a particularly super-made one), that doesn't mean that they were rare. With the very, very big note: They weren't rare *in Eastern Europe and further East*. In the West and especially in the North, they were very rare, but that's because of the damper and colder climate, which wasn't suitable for them (weakening the glue holding the composites). So, from a Western European point of view - sure, they were very, very rare. But from an Anatolian point of view (not to mention a steppe one) - they were quite a common sight. Of course, simple self-bows were also in use in the East, probably by the poorest of people, but composites were common nonetheless. Especially in the societies which still had a more tribal organization and, respectively, a warrior culture.
Now, point by point:
Jason L. said:
In brief:
1) The really good bows that made the difference in battle were difficult to find fabricated by few expert artisans.
2) only good trained for life soldiers could use them. Among other thinks because otherwise the rate of fire (it was important) was too slow and hi rates difficult to achieve.
3) On horse archery was even harder and unless one was continually trained could loose his skill . In the Byzantine army one year was not thought enough to train horse archers using hunnic bows
4) if one wasn't trained to use superior bows he was more effective using simple ones .
1) I already addressed it. Plus, if we're talking about the *really, really good bows* (i.e. masterwork bow, in M&B terms) - then that's true about absolutely every other weapon, armament etc., anywhere. We're not talking about masterwork composites here, but about common ones.
2) You're either thinking about longbows (which indeed require a long time of training just to be able to use it *normally*) or you're thinking about *expert* usage. Both points are irrelevant to this discussion - there's a difference between the skills of elite units and common ones (which is portrayed in the game as well). Otherwise, the higher rate of fire is exactly what sets the composite reflex bows apart from the simple self-bows (not to mention the longbow).
3) First, there's a huge difference between "a lifetime" (which itself is an absurd term, since if training requires a whole lifetime before being able to use that skill, then that skill would be able to be used only when you're on your dying bed) and "more than a year". Second, there's a difference between "horse archery" (steppe style, Parthian shots etc) and "mounted archery" (archer mounted on a horse, who rides to a location, then stops and fires, which is what most of the native-Byzantines did (and which is why they prefered to hire "foreign" troops to serve that role)). Third, just because something's harder doesn't mean it wasn't used - there are many factors which influence to what degree a certain type of society would be used to this. Generally, nomadic tribal warrior societies (like the steppe tribes - Cumans, Mongols etc) were the best in this and practically almost every man in those societies was an accomplished horse archer (note: HA, not MA), because that's a part of their culture and lifestyle. The neighbouring societies, the former nomads etc, often only reached the level of "mounted archery" - the Hungarians, Balkan Slavs (maybe southern Russians as well), Byzantines and, I presume, the settled Seljuks (though I wouldn't be surprised if at least some of the Seljuks, living in the plains, preserved their mastery in "horse archery").
4) If one wasn't trained using a sword, he was more effective with a stick - that's true as well. Yet there were people quite trained with the sword. And, again, here comes not only the social stratification in the feudal societies, but also the cultural difference between a fully feudal society, a semi-feudal society (or a centralised, imperial one) and a tribal society, whereas the latter relied quite often on war and raiding to make a living (not to mention the nomadic lifestyle, which further developed some of those skills even during the simple things like herding) and thus mostly developed a warrior culture, where most men were more or less trained to fight - quite different from centralism, where fewer men were trained to fight, and feudalism, where only a rather few people were trained.