Disneyland does have Magicbands, it's just that most vacationers don't know Disneyland uses them and locals just turn their noses up to them. The reasoning being something about since they had to take their phones out to book a LL an hour prior, it's just easier to pull them out again to scan them instead of raising their wrists....or something like that
Also, people think the bands lighting up for shows and attractions is gimmicky and don't want to be associated with things that are gimmicky even though they get you through entry and LL much faster. Again....
My friend and I used them on our trip last March and we enjoyed them. They made gate entry easy and when others were fumbling with their phones or trying to find their tickets in the LL entrances, we walked right up, raised our wrists, and kept moving. Made scanning photopass easier too. To each their own. We liked how they lit up in some of the ride queues. Since they are chargeable they now last you much longer for the money unlike the original MBs that didn't charge.