I think most concerns come a lot from the point of view of trust that the converter does the right thing. If I take a designer XD file, convert it to Figma and give it to a developer for implementation, I want to be sure that they don’t waste billable hours making a wrong gradient or battle some odd masking issue. As a consulting shop, we tried some tools, for example Avocode - but ultimately cancelled it. Tools were usually 95% correct, but because of the remaining 5% we’d end up still paying for the zoo of Figma/Sketch/Adobe/Invision. Oh, and still needed those cause designers would forget to mark assets as exportable and Zeplin can’t pull assets unless that’s done. </rant> :)

Sooo, a preview or a trial or some recourse like easier refunds (even back into credits) would be to improve the perception