I had not tested CintaNotes but relied on someone else's testimony when I wrote the previous post on it. So, I thought I would actually test it with my approximately 10,600 text files from ConnectedText.
The short of it: I couldn't. CintaNotes uses its own file format (*.db). You can import db, and xml files, no txt files. It has a selection for "All files", but it does not recognize txt files. So I could not import the notes I used in ResophNotes and nVALT. This means that I could not test CintaNotes due to its limitations in import.
For what it's worth I used an SSD drive for all the tests. My notes are small, most of them 500 words or less, and I did not even test search in ResophNotes. Just moving around between different files and trying to change a word or two was too slow already.
I was going to try xml import, but then I found in the help file: "You can import notes using the File/Import command. You can import notes from previously exported XML files and from other notebook (.db) files." So, there does not seem to be a way to import any notes taken in any other application before. This makes the application useless to me (and, I suppose, to many other people who would like to migrate to CintNotes from any other note-taking application.) I have, accordingly, deleted CintNotes from my machine again.
Let me just say that the inability to import text files seems to me a more serious limitation than ReophNotes limited ability to handle a large number of text files.