That is pretty good.
Never going to replace expensive commercial applications (which originated from autotrace in the first place
think vector-magick @ $10 a month)
Using Linux: Into multi-window mode for examples:
1. Typical centerline trace of a jpg (which would have been a vector originally)
This is actually very good. A nice clean path.
2. One of the often asked questions. A small logo - make it larger without blurring. The usual answer is make a svg using Inkscape. Possibilities here, although autotrace never was good with text, so lose that. I do know the limitations of autotrace but might save a bit of hand tracing with the path tool.
For linux users, temporary files, including svg's are in /usr/tmp/gimp/2.10 Keep an eye on that, fills up quickly.