It is dependent on enough witnesses upgrading to 19.10. Once that happens, then UIs (such as steemit.com) will need to be updated to support it.
Enough witnesses have upgraded to the point that it is probably to the point that someone could do it and the blockchain would accept it, but it would likely be very slow.
Once more witnesses update, they are planning to update condenser (steemit.com).
It is possible with the Surfer App by @goodkarma. I just edited a 10 day old post. It is indeed slower but it works.
Tks for reply guys
will try out the app..
@exyle - when you say it is slow , you mean as in once you commit the changes it takes a long time to propagate them and update the post ?
Normally it's within 3 seconds but I'm guessing that the transaction has to wait till it runs into a witness that runs the new version for verification. Longest I had to wait was about 20 seconds.
K good to know for @SteemPeak was wondering when we could do this.