Another good example is the Zelda Ocarina of Time any%, which progressed as new techniques allowed skipping more and more of the game, but which was still prett

Another good example is the Zelda Ocarina of Time any%, which progressed as new techniques allowed skipping more and more of the game, but which was still pretty broadly popular even when it was a warp to the final boss in under 20 minutes, is now way less popular now that they discovered a arbitrary code execution method that credits-warps in under 5 minutes. This process had already been going on before, but you have this progressive sequence of the speedrun getting harder to play and harder to watch. You see some spliting out to restricted categories but even those aren't all that popular, but also something else that's recently become really common particularly in the communities for these games that have been optimized to death: randomizers. Shuffle around the positions of the necessary items, or the map itself, and you have something that's fresh for viewers and people who've played the game forever, an extra aspect of chance, usefulness of skills and familiarity with parts of the game that wouldn't otherwise be relevant... but it does split the community even more.