I wish Roblox were to add a __changed metamethod for metatables, but they literally said they will not be adding it because of “impact on performance” and it cannot be implemented for “in various cases where metamethods are already ignored”. 
I wish Roblox were to add a __changed metamethod for metatables, but they literally said they will not be adding it because of “impact on performance” and it cannot be implemented for “in various cases where metamethods are already ignored”.