The report’s core fault is conceptual and methodological. Its definition of “alternative social media” is “social media sites with relatively small user bases that have typically emerged as alternatives to larger, more established social media sites like Facebook, Twitter and YouTube.”
I agree with this observation. Getting people who otherwise do no care about “backend, code phiosophy etc” to see the power of fediverse would be a major milestone. A lot of people care about something like sports. Having an organized way to discuss news, streaming, historical footage etc would bring such converged interests regardless of whether they understand ActivityPub specifications.