
Very expensive for less chance fo pregnancy than a natural mating which is always preferable in my book.
We are fortunate we do not have Canine Brucellosis to worry about in the UK, which may be one reason fro the use of AI so commonly in USA, in addition to the huge distances breeders may have to travel otherwise.
I would use ch8illed semen, but it is still far more expensive with all the red tape (the donor has to satisfy pet passport criteria, you need a licence, approved carrier/person to hold the semen, vets both ends for collection and insemination, as well as all the progesterone testing for timing) and people involved than in a lot of cases travelling with the bitch for natural service.
As a method to store semen for use in later years after a dog has passed away, and been proved to be free from health issues of his own and those of previous offspring's health and longevity, could a useful tool but I'd like to see the KC set up a storage facility. With private storage a company could easily go out of business, and then your left looking fro new storage options.