It can trim without re-encode? I always thought it was more like a standard NLE.

It's a slightly different use case, I default to Losslesscut and switch to Shotcut when I need a vfilter or if I'm just generally willing to concede to making a lossy cut.

Shotcut is way more flexible but I can make a quick clip in Losslesscut with probably 1/3 the number of user effort/inputs. Let alone trying to remember every ffmpeg parameter under the sun just to get consistent usable output