How many more years until we can edit a post?

I'm sure this an alien concept so I can understand why this sort of technology is so far beyond our ability to comprehend, but ...imagine a feature that would allow someone to edit a typo in their post within a 3 or 4 minute time window?

Mind-blowing I know, but just imagine if that sort of technolohy were possible. If a team of brilliant software engineers spent a few years brainstorming such a feature...I mean, I could see it maybe happening one day.