I'm a Janome woman. Still, I never use the thread cutter, auto threader, decorative stitches, button holer or knee lift on my 6500P. I learned to sew without all this stuff so not sure I'd ever use them.
My 1600P is on a quilting frame and is straight stitch only, so I will use the thread cutter there. My other Janome is my first one I started out with 20 some years ago and has the basic stitches with a small throat, it's now my backup machine in case the 6500P needs repairs.