I guess the best test would be if you free motion on your regular sewing machine without a stitch regulator.
When I started quilting, I free motion'ed without a stitch regulator & found it frustrating. Now I have a new machine with a stitch regular and absolutely love it. I can concentrate on the design instead of worrying about my stitches.
I also have a 2007 Tin Lizzie I bought used and it has a stitch regulator. Worth it to me on both machines.
SewingLadyDI