So what would happen if i didn't see this thread and didn't follow the video whenever it was released and only came back after the 21st.
What would happen to my coins in my old wallet?
the only thing that would have happened is your old 1.4.x wallet would have opened, not synced properly or just not synced at all. After that, you would have to just follow the steps to open a wallet in the rebase and you would have been fine. As long as you have the files for the wallet, you will be able to recover it. We are looking out for you guys. We don't want you to lose out.