I know a lot of the employees at chain pet stores love birds... But most of them are absolutely clueless. I know a few good ones, but seriously have received some terrible input from places like that.
I band all my birds with a closed band in the nest. Having that band number is the surest way to prove ownership of your bird. This is also important to me because of my adoption policies and how strict I am and the measures I take to make sure my babies don't end up on Craigslist when disaster strikes their families, or if heaven forbid I send them home with good actors who don't have the level of commitment to them that I thought they did when I sent the bird home.
Banding also allows me to keep detailed records and be sure I know who is related to whom. Even though my contract prohibits people from breeding the birds I send home with them, I never send home opposite gender bid who are related to the same home; too much of a risk of inbreeding. And if a bird is ever returned to me because the family can no longer care for it, my band insures that I know EXACTLY which bird it is, who his family is, how much he weighed at weaning, if he ever was treated for anything, and a hundred other details, even if it is, say, a blue ringneck that looks just like the 10 other blue ringneck said that were produced that year.
Bands also facilitate interstate travel. In order to bring my beloved Flick with me to Hawaii I had to put an open band on her, which is very risky, because her breeder didn't band her with a closed band.
When microchips become safely available for the size of birds I work with, I will use those instead

for now I don't think they are old school, I think they are extremely valuable and, I feel, vital to responsible record keeping, regardless of which homes the birds are going to.
Now about Kyoto not having a band. Some states in the USA require a band or microchip. Some states require a band or microchip for the bird to be sold RETAIL. At our local pet chain pet stores even the finches have open bands applied, and I believe it is illegal to sell unbanded birds in a retail location. It could be that this is the law where you live, or that it is simply the policy of that pet store to require each bird to be banded, and that the associate misunderstood the regulations
