Hivecanon is good in the same way a building’s frame is good: you use it to build on top of. The best and worst part of this fandom has is that its core concept is very malleable. On the plus side, it lets people get very creative with stories and art. On the down side, it encourages the uncreative to be even more lazy with even basic aspects of worldbuilding and continuity.
The fandom balks when major hivecanon is changed in a story, and with good reason. If the most important parts of our collective continuity are treated with the same casual regard and more esoteric things like Jellenheimers, resets, poopy babies, Cleveland, etc, the creative space turns into an anarchy zone. But I’m still not opposed to it in theory, but you better make something entertaining and engaging enough to be worth the major shift.
A story concept I had imagined but never put to paper was a guy trying to solve the mystery of why there seem to be so much contradictory information about Fluffy Ponies. He eventually realizes that fluffy ponies, being artificial creations instead of naturally evolved creatures, are not only genetically unstable, but also cosmically unstable. They break probability all the time purely by existing. This is why they always manage to find themselves in impossible situations. Most fluffy pony lore contradictions can be explained as being different universes with different rules (i.e., different headcanons meant different continuity), but plenty of content creators will break their own rules or introduce new ones all the time. In this hypothetical story I never wrote, the guy figures out that fluffy ponies will accidentally shift into different universes and continuities all the time, and never be aware of it because they’re stupid and die easily in virtually every headcanon. This would also explain how a physically impossible amount of fluffy ponies descended on Cleveland; a lot of them came from other dimensions accidentally. Don’t ask how, it just happened because fluffy ponies are just quantum weird like that. In some people’s universes, Cleveland was a nuclear disaster, in others it was a minor kerfuffle that had little lasting consequence, and in others Cleveland is just a city in Ohio where nothing fluffy happened at all. Never got around to writing it because even in my head it was getting ponderous and not interesting outside of a meta exploration perspective, but that idea definitely stuck around as a rule to help understand this weird little fandom.