I also used to use Quicksilver back in the day. Now it's a mix of Alfred and Spotlight. Alfred for launching things and workflows, Spotlight for things like quick unit conversions and such. Alfred is bound to Cmd-Space while Spotlight is Cmd-Shift-Space.
Same here. Despite Legendary status, I’ve used Alfred as a souped-up launcher and implemented my workflows app-agnostic either as a shell script, a Shortcut, or an AppleScript. I haven’t launched Alfred since upgrading to Tahoe.
Especially since you can now create Shortcuts that get input directly from Spotlight or the active window.