Yes, the ergonomic rotary cutters are great. I've been using mine for many years but remember the fatigue from cutting when I used my straight handle cutter. And if you don't already have one, I would recommend a rotating cutting mat. They are so convenient, especially if you can't walk to all sides of your cutting table or just don't feel like walking around it to cut from another angle. Joann's rarely has them on sale so I got mine with a 50% coupon at Michael's. Love it!
There's a cutting device that uses old rotary blades that are then used to trim threads. I think it is purple in color. I am forgetting the name of it but will look for the company later when I get a chance. Or maybe someone else knows who makes it.
Looking forward to other ideas for new tools and gadgets. Anything that helps us quilt smarter, not harder.