What's interesting is how the low end ammo demand also restricts the exotic stuff.
For a while, it was extremely tough to find large magnum rifle primers, and the large caliber/slow burn/high energy powders (N560/570, retumbo, 4831SC, etc)...fungibility of raw materials I guess, better for those companies to divert raw material and mfg to higher demand powders/primers (since magnum and regular LR primers vary only in composition, and all powders start from the same raw materials) than the lower demand stuff.
Fortunately, I had the lucky/unlucky aspect of having no time to reload and shoot due to work combined with having a pretty good inventory of components already.