That is a bit of a worry-ish. They said 2022 but no month. So that can mean that you can buy them Dec 2022. Our trip is Feb 2022. What would Disney trip planning post-lockdown be without constant uncertainty? You think you have all the facts on one small, tiny area (MagicBands) and bam they throw a curveball.
Right now I am leaning toward buying the solid color MB's now. And if the MB+ comes out in time buying just DD one of those. We have multiple reservations, so there isn't a problem with getting another discounted MB later.