PowerToys Run provides a Spotlight-like search bar that you can toggle with a quick shortcut to search files, launch apps, ...
Sure, using the Linux command line is optional. But these are commands I rely on every day, and you can benefit from them, too.
ShaniOS maintains two separate environments. If an update - or anything - goes wrong with one environment, simply reboot and switch to the other. I am seriously impressed.
If you want a more genuine Quake experience, you can set the keyboard shortcut for Yakuake to the ` key (sometimes notated as ...