I edit my stop motion animations with Shotcut, especially to add and edit music and sound; I only use the simplest visual features of Shotcut because most effects are already present in the animation, and I want to preserve its “handmade” style.
One problem, though: Shotcut crashes frequently when the number of edits grows. Nothing is lost, but it’s awkward. The trick of exporting and re-importing works most of the time - but it’s not easy to find the right point in the editing process to do it.