The Services menu is getting a well deserved love from the Kaleidoscope blog:

The Services menu, originally part of NeXTSTEP, was introduced to the Mac with the advent of OS X in 2001. Throughout the entire history of OS X (now called macOS), Services never received a lot of love or major updates. Luckily, Services continues to work to this day and can be remarkably helpful.

One of the things I like about LaunchBar is its integration with the Services menu. There is no need to install a bunch of LaunchBar plugins; you can simply reuse already provided system services and share extensions from installed apps.