A thought you cannot capture in about a second is, for practical purposes, already gone. Not slower to retrieve. Not filed somewhere inconvenient. Gone, with no copy anywhere, and usually you do not even notice the loss, which is the part that should bother you.
I spent years treating my note-taking like a storage problem. I compared apps by how they organized things: folders versus tags, backlinks versus search, local files versus a synced database. Every few months I migrated to whatever promised a tidier shelf. None of it changed the thing that was actually costing me ideas, because the thing that was costing me ideas happened before storage was ever involved. It happened in the gap between having a thought and getting it out of my head, and that gap is measured in seconds, not in retrieval quality.
There is an old experiment that I think about more than is probably healthy. In 1959, Lloyd and Margaret Peterson gave people three-letter strings to remember, then immediately made them count backward by threes so they could not rehearse. After three seconds of that distraction, people still recalled the letters about eighty percent of the time. After eighteen seconds, recall collapsed to around ten percent. Eighteen seconds, and the letters were gone, because attention had been pointed somewhere else for less time than it takes to find the right app and tap into the right note.
