The rampant discontinuing of cosmetic products that encourages hoarding and excessive consumerism.
When it comes to makeup, I mostly have one of each item because they're purely utilitarian to me - except for lipstick. I like having a few different ones, just for variety's sake (right now I have three), and I generally won't buy one unless I've used something else up. That takes about three months of everyday use. However, within those three+ months, shit I'm eyeing often floats in and out of stores, with absolutely no warning that it's "limited edition".
I'm picky when it comes to lipsticks. There's a small range of colors I like to wear, and if every brand has, say, five different formulas of lipsticks with different properties, I might like one formula, and one color in it. Last night I was browsing to find one of the lipsticks I have on my tentative shopping list that fits both criteria, and boom, it's gone.
Beauty industry, you will not get me. I refuse to pounce on stuff as soon as it's released because I'm afraid you'll discontinue the shiny thingy I like. I don't care if it's the color of the roses from the garden of Eden and formulated with ambrosia. Even if I didn't have the "use one up to purchase one"-rule, it takes me several months to read and compare reviews and see how the reviews "age" (say, maybe one of the reviewers noticed their lipstick changed its consistency within several months, or maybe something even better comes out, or whatever). I don't ~collect lipsticks~. I don't wanna waste money introducing consumable goods in unrecyclable plastic packaging into my makeup bag and my home unless I'm sure that's the best option out of everything on the market, and it takes time to determine that. I'll just go to the few brands who appreciate their returning customers enough to keep a reliable lineup of products for several years.
Shaking my fist really hard at Maybelline right now. "Maybe she's born with it - because that particular color's been out of production for a while" doesn't quite roll off the tongue but it's true.