Command Space: A Review of LaunchBar and a History of Application Launchers Shawn Blanc
shawnblanc.net/2014/06/command-space-a-review-of-launchbar-and-a-history-of-application-launchers
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
For the persnickety power-user, there is but one way to navigate around a computer: with the keyboard.