I can already see you standing in front of a board. 😉 Anyhow besides my terrible joke I know you can keep the post alive by pressing the + on the bottom right of the screen to keep the post alive, but as far as I know there is no guarantee that it will save it for longer periods. I also think that this can be done as a plugin.
Yeah.. I with you there and can totally understand the point to a streaming forum like nodebb, still we all make mistakes and this would be a nice addition. Would save so much typing 😓