It's changed over the last 9-12 mos, last Black Friday, still had lots of stock around online on most products. Some of the slowburn powders like h1000 & Retumbo & RE26 had been off and on for a while before that. Primers have been available all along, but the newer batches after Xmas went up. There have been 3 price increases since last summer about this time, two of them were ones I've seen people publishing the notices on this year, one was last year, just when, not sure. So, consider the ones this year at 15% each to the distributors, that's why you have primers going from 69.99 last fall, to as much as 99.99 this year, but, it looks like the 79.99 price will be the new standard. Also seen someup to 11.99/c, then the price went back to 9.99, on some of the match primers.
After Xmas, about the end of Jan, was when IMR/Hodgdon powder in general seemed to disappear for the most part, some of it lasted til April. Most of their powders are imported to the US these days though. I've noticed Staball was fairly steadily available. Seems to have been a fair amount of RE & VV powders around, mostly VV, depending on what a person was looking for, occasionally some Ramshot showed for a bit here & there.
Think we are still in a period where powder will be hit & miss, as I understand it, November orders are the ones being del'd now. And the price is up on it, something else we'll need to get used to. Vista was saying in Feb/March that the orders they were taking would not be del'd til 2022.
But, the shortage applies to a lot of other stuff as well, the entire economy here and around the world is screwed up all over all kinds of industries, and doesn't show any real signs of recovery for quite a while yet.