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I think it was part of 19.10

Unlimited content editing (past seven days)
The release will include a change to allow unlimited content editing (beyond seven days)!

Once the 19.10 release is deployed to production nodes (by the witnesses and RPC node operators), the blockchain will allow changes past the seven-day threshold. After that, it will be up to individual UIs to support unlimited content (or not).

OP:
https://steemit.com/steem/@steemitblog/steem-19-10-officially-released-appbase-rocksdb-unlimited-content-editing-and-more

Okay.

So, it looks like there is a delay between when it was "released" and when it really will be released. And, Steemit or other UIs will have to make updates to allow for it.

there is a delay between when it was "released" and when it really will be released

Do you know how much delay? wasn't it released with that announcement ?

No.

There are dozens of witnesses, so it depends on them to push the updates through. And to get Steemit or other UIs changed, I'm sure that would be more than a quick edit of the code. It does sound like it would be easy, but I bet there are more hooks involved.

Tks for replying..

waiting for the changes