Do any of the modern filesystem on Linux cover this very important use case of instant search anywhere like the good old NTFS does (that's how you get Everything's awesome performance)?
Have you tried anything else like Everything? It's common to feel no need if you haven't experienced the awesomeness of immediate feedback that in many parts is easily refinable with a shortcut maintaning the same properties, e.g., turn case sensitivity: no need to get your query from history, edit flags and rerun it; or add another column with extra data, same thing, no need to remember the rarely used flags or run a help command to get them, edit query and rerun it
