I don't really do phrases only keys but yeah, good luck remembering all your keys throughout the years. I've got two fire resistant cold storage metal cards and outside of that I just use 3 pen-drives duplicating each other, encrypted, stored in different locations. It's the only form of key storing I'll ever need tbh.
Discussion
I saw your YouTube video in saving keys 🙏💜
Why you don’t use seed phrases? Isn’t it more simple?
A phrase will recover the address from one particular wallet but over the years there has been many of those and back in the days we didn't really have phrases, just keys. So you could say I grew up with keys.
Also, if you store individual keys instead of phrases you can import any key to any wallet of that respective chain at any time. Or use the same key across multiple devices, up to you. Phrases, I don't know, they aren't for me.