I eventually settled on a hardback A4 notebook. I don't usually need to scan back more than a few days, but one book lasts several months. You can use it stand

I eventually settled on a hardback A4 notebook. I don't usually need to scan back more than a few days, but one book lasts several months. You can use it standing up, e.g. in a SCRUM. It's resistant to having a mug of coffee spilled over it. It never crashes, and it doesn't need RAID or backups. You can attach post-its to the pages. You can use a stack of 4-5 of them as a monitor stand. Downsides: you can't paste screencaps into it. And there's no search function. Yes, it's a glorified grocery list. But it works better for me than any electronic solution.