I don't follow this rule strictly, but for most of my adult life I've limited most of my book reading to books > 10 years old. If it still seems remotely relevant and worth reading ten years later, it is far less likely to be a waste of my time. Now sure I'm a bit less prepared for water cooler conversations, but overall the policy has served me well.

> having trouble finding anything actually good to read on Kindle

because of AI slop is new benefit of sticking to older texts that I hadn't anticipated.

A significant amount of ebook reading now is romance/erotica or fantasy (or combined "romantasy") genres by readers for whom something a decade old won't appeal. An old book could seem socially "problematic" from a 2026 lens (especially for young people for whom that is before their time), or it isn't what one's peers are reading and one wants to connect with a community of other readers online or in school/university, etc.

Obviously if one doesn't read these genres, this is a whole foreign world, but it is increasingly the state of mainstream fiction reading, and AI slop is a problem for them that you may be asked to help avoid if you are the nerdy loved one of such a reader.