Not sure about the specific features of hypertext, but in general: bi-directional linking, block references (Roam is an outliner like Dynalist or Workflowy), bl

Not sure about the specific features of hypertext, but in general: bi-directional linking, block references (Roam is an outliner like Dynalist or Workflowy), block transclusion, graph view of your page network... Of course, you could throw a bunch of scripts together to approximate these features — but you don’t have to, since Roam (and Obsidian and others) exists.