So in short, the only limitation to a poster finding their post would be if they remembered the main forum index and then went looking specifically in the sub-forum in which they believed they had posted it. Fair enough.
I had no trouble getting back here since I never left. For the moment, I have it in a separate tab and it auto-updates - unlike the old forum.
The only real problem is that every time I back up to the main forum index, it resets to the start of that index or somewhere essentially random! 
Well, it does a few other annoying things also ...