Why would it be infinite? Just load all the comments at once! Show me everything. Modern caching strategies mean it wouldn't be any database load or concerning

Why would it be infinite? Just load all the comments at once! Show me everything. Modern caching strategies mean it wouldn't be any database load or concerning computational overhead? I'm no expert on HN-scale sites though. Anyway, my 2 cents is I'd prefer everything loaded at once, no pagination, no infinite scroll.