static /*cached*/ L<Web> allDownloadedWebs() {
  new L<Web> webs;
  time "Unpacking webs" {
    for (Pair<S> p : downloadedDiagramStructures2()) pcall-short {
      CirclesAndLines cal = cal_unstructure(p.a);
      if (nempty(p.b)) cal.globalID = p.b;
      webs.add(calToWeb(cal));
    }
  }
  ret webs;
}