It turns out, I haven't been running #TRIM on my SSDs for the last 12y or so. I've been using #EXT4 on #LVM on #LUKS everywhere and systemd was reporting that fstrim.timer is running, and I never bothered to check if it was actually doing something.
It turns out that the dm-crypt guys have made TRIM an opt-in feature, because empty space will no longer be random, more on:
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