I think it's a bit off the topic, but I'll tell you about the situation in Korea that I can talk about.
It may not be realistic for most of the zoochatters here, but there are only two bactrian camels left in South Korea, the male "Coco" at Seoul Zoo and the female "Millebong" at Everland. But Coco was born in 2011, and Millebong was born in 2000, so they are both quite old. Maybe that's why, Everland has disposed two young dromedaries named "Dan-i" and "Bong-i", near Millebong from March of this year, as if they preparing for the death of Millebong.
Even though Mongolia, the birthplace of the bactrian camels, is close by, the situation has become like this is because of Korea's very strict quarantine system of Artiodactyl to block foot and mouth diseases. This is also the first reason for the decline in giraffes, antelopes, buffaloes, and bison in Korean zoos. Actually, I think it's better not to bring in more animals, that will die without breeding properly due to the madness of bad visitors.
Anyway, Now the dromedaries and alpacas are mainstream camels of Korean zoos. The reason is simple. This is because they can be imported from Australia, where there is no foot-and-mouth disease, and the most visitors are thinks, "Alpaca is cute!"
Public zoos operated through taxes are hesitate to let secure new animals, but private zoos, which aim to make money quickly, wanted alpacas that could attract visitors' response. It is thought that the alpaca population has increased along with the number of private zoos that began to increase in the mid-to-late 2010s. So, with alpacas readily available in Korea, some public zoos have also begun securing alpacas.
Guanaco and llamas are thought to be less popular because of their ambiguous look between a humped camel and an alpacas. I could saw many visitors were mistaken them for alpacas, also they often knew the llama, but guanaco didn't.