The Dungeons and Dragons 3.X ecosystem is huge, with core books and splatbooks for essentially 3 different almost compatible systems. We often have questions that ask for character or monster options from either D&D 3.5 or Pathfinder in very general terms. The answer that spawned this question is How does a PC make a permanent extradimensional space?.
The problem I see is that you end up with not multiple sometimes overlapping list answers. How do you decide which one is best without more detail?
We have 222 questions that are tagged both dnd-3.5e and pathfinder, but many of these are comparing rules in the editions, or asking about how an effect might be handled.