I tried to articulate this to @ek, but I don't think I explained it well. Also, he told me that they didn't love the idea of creating special use posts. 

siggy47

@k00b please add a special type of posts, like educational, guides, lists something like that. So OP can update them anytime if is necessary. It can have an additional cost too for each update, no problem with that.

For example these posts can be pinned in the specific territory and keep them updated.
@Radentor is trying to make a good work building some directories, but these will be lost in the history and also not updated.

DarthCoin

Stacker Saloon

saloon

You're right. I can see why discussion posts can't be edited after 10 minutes, but not these kinds. A new type post with edit function would be good. 