When a thread turns into a chat, it makes sense to display it as such. 
This usually starts to happen from the second level of replies to a post. #nostrdesign
https://cdn.satellite.earth/59a0f06770b1eb23557fc74702164cef378868004bb5642db00df524106aa859.png
nostr:nevent1qvzqqqqqqypzp75cf0tahv5z7plpdeaws7ex52nmnwgtwfr2g3m37r844evqrr6jqqsq4c4v3dl5rfs4eff9a22g9e6n9seehc4jp5ln7s4p2d3qa5q5hlqt8klsw