Most that still use Quicksilver to today are likely not "most people". The "object-action-object" command of QS is not something Spotlight is capable of (e.g. drag files on desktop to trash, open these images in Photoshop, all without involving a mouse click).
I've quit QS for LaunchBar few years ago (when the author announced the development for QS has ceased) then Spotlight then Alfred. I think Alfred did better than Spotlight as a launcher because of slightly better results (e.g. typing "pho" in my machine list Photo Booth and iPhoto but not the one I want the most: Photoshop) and few little touches here and there where Spotlight didn't get it right (e.g. "press enter to copy" for calculations).
I use file actions a lot (move these files, trash this, etc.), so Spotlight is pretty much out of question.
I've quit QS for LaunchBar few years ago (when the author announced the development for QS has ceased) then Spotlight then Alfred. I think Alfred did better than Spotlight as a launcher because of slightly better results (e.g. typing "pho" in my machine list Photo Booth and iPhoto but not the one I want the most: Photoshop) and few little touches here and there where Spotlight didn't get it right (e.g. "press enter to copy" for calculations).
I use file actions a lot (move these files, trash this, etc.), so Spotlight is pretty much out of question.