Conversational interfaces are a bit of a meme. Every couple of years a shiny new AI development emerges and people in tech go "This is it! The next computing paradigm is here! We'll only use natural language going forward!". But then nothing actually changes and we continue using computers the way w
Quicksilver for Mac OS X was the original one of these apps AFAIR. And it appears it predates all of those (launchy, etc)
I prefer Alfred these days myself.
You can even do similar with just Spotlight on macOS and the Start Menu in Windows 10+.