100% agreed, no two words about it, IT needs to be done, sooner or later, but needs to happen. That 7 day interval doesn't encourage the creation of Immortal level quality posts. And I've found posts incredibly good from months ago that deserve a vote just like the more recent ones, I can't provide an economic solution but we do need to make it eventually.
It just takes the right incentives for dapps to want to do it. If many users want it they will want to implement it more.