Thanks for reporting this issue - assessing is not supposed to take more than a minute or so. This is not strictly necessary but filters out models that don't fit in memory and gives speed estimates. This should ideally be a very short step so skipping hopefully wouldn't feel necessary if we patch this.

Could you share your hardware and OS details to help us identify what might be the issue here?

There's also a github issue open on this topic if you want to leave a comment there: https://github.com/magnitudedev/magnitude/issues/142