> Why will it so often not display any results at all, even for system apps like Safari or Terminal?
I've experienced this too, even after giving spotlight multiple shots months apart. For your sanity, I say just stop using spotlight. Don't let Apple steal your valuable waking hours with their crap QA.
But I'm sure there is some explanation but when I launched an app using tuna I got a standard macOS security notification "Tuna.app was prevented from modifying apps on your Mac"
Why a simple launcher needs "App Management" permission ?
I've experienced this too, even after giving spotlight multiple shots months apart. For your sanity, I say just stop using spotlight. Don't let Apple steal your valuable waking hours with their crap QA.