Old world type readded for Bedrock

Can you please add back the old version type to the launcher? I liked old, it provided a nice challenge with limited space. I know you all said you can still use the old worlds you already created, but no. Every old world after the old option was removed, my house and mines and everything were all gone. I also know you can use the barrier block with cheats, but that would be time consuming, and mean no achievements. Please add it back!