I’ve used it for many of my videos and it’s quite good. It’s amazing for simple edits and can handle more advanced stuff, but from my experience it bogs down with many effects. For complicated projects I recommend Resolve, but for simple to medium complexity video edits I fully recommend Kdenlive, as it’s better and more crash resistant than all the other FOSS video editors.
The slashed zero is the empty set, and the slashed O is literally nothing cause screw the slashed O