Blizzard
Bônuss are getting pushed off at well below 32 buffs. My hypothesis is that there are hidden aura buffs from enchants, talents, and gear. From what I've read in original patch notes the hidden aura buffs were fixed to no longer count as a buff slot, but in Classic WoW they currently are.
This has major impacts on raiding, specifically high end raiding. Druids are already being told they can't use their healing over time spells. Hybrid specs that provide a crit aura are far less useful with taking a buff slot. Consuming and world buffing, like it or not, is a reason many people continue to play the end game.
Without knowing what these hidden auras are, it's impossible to see and plan for what talents/buffs/spells/gear/enchants you should and shouldn't be using. If Classic WOW decided to use 16 debuff slots instead of the 8, shouldn't the same line of thinking being applied to removing the hidden auras as counting as buff slots? I believe the reasoning for the 16 debuff slots was that it was just a technical issue that didn't allow it back in original WOW.