I would be more forgiving to hand over the term "roguelike" to roguelites and other PGC-based games if I had a term to replace it. The problem is - what's a better term than "roguelike" to mean "more like Rogue than the other things which are (sometimes only very slightly) like Rogue"?
"Classical roguelike" usually means "direct descendent of Hack/Angband/Larn/Moria" (Rogue itself produced very few descendents, I think). "Traditional" excludes several interesting categories which are uncontroversially roguelikes: games not part of the current 'body of practice' like Dungeon Hack; radically different PCG approaches like 868-HACK; and the Japanese design lineage in e.g. Shiren or Baroque which uses a very different approach to progression dynamics than today's roguelites.
OP's blog post is from 10 years so I can't blame them. But today "Roguelike" is usually something slightly different.
A roguelike these days is a game that has (at least some) procedurally generated content and permadeath without meta progression.
A roguelike purist would call these roguelites.