Spotlight used to be the fastest way to launch apps and find anything on a Mac. But since macOS Yosemite I always experienced split-second delays when launching Spotlight with
space. Also sometimes it takes a few seconds to find the results I was looking for.
Alfred 3 is a Spotlight replacement that brings tons of additional features (shutting down your Mac, finding contacts, etc.) but most importantly: it’s a damn fast app launcher. I don’t feel any delays, results are instant and that’s all I want.
The app itself is free, but the commercial Power Pack is a great way to support the developer and further development.