How Would They Implement A "Calamity" Again?

[ItMe]

I've been curious, seeing some responses people have posted that say they think SE may implement another calamity, or at the very least that they hope they do ahah. So I guess my only question is how do you think they'd do this?

IF they did this, the main way I think it might go down is by something happening in the story (like surmounting the shards all being messed up & having them linked together in a symbiotic way that doesn't lead to calamities as they're absorbed into The Source, or whatever) where the WoL ushers in a new era where everything is in balanced and the worlds are flourishing... and that manifests as a graphical / system upgrade.
Not that they'd need to tie the change into the lore, but it could be fun.