I currently use all 3 builtin search functions in Alfred. (Way cool thanks).
Filefilters impose M*N problem:
- 3 search types
- 4-5 filetypes (pdf, docs, spreadsheet, picture, ... the player to be named later)
That's 12+ searches to memorize.
If the amazing creators adopt a syntax similar to spotlight then I only need remember 3+4. Furthermore since kind is already a spotlight keyword, new users will have slightly easier time getting into Alfred.
Final point on the effort/cognitive load front. I don't usually realize I need to filter until I start typing "in" and it brings up a mess of files I'm not interested in. By then I would need to return to the beginning of the buffer to change my search.
Bonus round: The same approach would allow me to append keywords for "date" or "less 30 days old", ... -- the key takeaway is that is fun to narrow down your search list after you start typing.
Double bonus - I just realized the "*pdf" doesn't work if the keyword is "in"
Cheers
Mark