I've tried several launchers in the past decades, across operating systems. On Windows I'm a happy Keypirinha user — it's fast, uses a twentieth of the memory needed by its C# relatives (Run, Flow, etc.), and results appear with almost no latency as I type.

Plenty of plug-ins (list here https://ue.spdns.de/packagecontrol/ ) and they are fairly easy to develop: a Python code that returns a catalog of results, statically or dynamically.

How is searching for documents? Can it search within files? I have used Listary, PowerRun, and Fluent Search but they don't find all the files, especially if the files reside in Google Drive. (Listary used to be pretty good before the update.)