I'd like to echo and second this request, if I understand it rightly...

One of the highest perceived values to *me personally* of posting on Steemit is the promise / hope of **blockchain immutability.** I view the value of at least *some* of what I write to be durable and long-term, and I would like to think of Steemit as a place where I will be able to maintain a "legacy of thought" for anyone interested to continue to come and read into the future.

As I was reading this 0.17 change proposal, I had thought to suggest a "lockdown" switch allowing any author to permanently lock any particular post. Reading @pfunk's proposal here, I like it much better - assuming the security of my keys - because it behaves a lot like the current system (i.e. "automatic lock-down" after 30) while still allowing for intentional, key-access editing of earlier posts.

One of my uses for this "long-term" editability of a post is maintaining (on my own, using the current UI) of a [**Table of Contents**](https://goo.gl/UnnylV) that resides on the blockchain itself. My current workaround/hack has been to simply re-issue the TOC at 30 day intervals; with editability, I will be able to simply update the existing TOC.