Classic WarcraftLogs enables parsing for raid groups having world buffs as well as a separate parsing mechanism for raid groups entirely without world buffs. There will be contenders, speed runners, etc for each category, for the enjoyment of all.
A lot of people have a lot of fun doing raids entirely without buffs as well as with. Both setups require technical expertise and good gameplay, as well as pre-raid coordination and cooperative play.
Much fun to be had in Naxx; I’m very much looking forward to it.
https://classic.warcraftlogs.com/character/us/bloodsail-buccaneers/leialoha