Yeah its a different one, I placed that just for a reference purpose, just to put light on all the high traffic website uses the similar methodology for their main content pages, infact wordpress blogs are also designed in a similar way.
In discourse we only have topic pages as our main content pages which can drive high quality organic traffic.
I believe if somehow we could add links to other related topics on each of the topic pages then it will improve overall interlinking of discourse and will result in better SEO.
People uses wordpress just because it perform best in SEO as compared to other blogging platform similarly if we could build that capability to discourse which is already 100X better then wordpress in term of product but I fee it still minutely lagging in SEO.