Recently I have started a new world in the beta 1.6.6 version of Minecraft my plan is to update the version each week until I’m at the current version of Minecraft creating a seemingly years old world in a few months. So far I have really been enjoying my time it’s probably the most fun I’ve had with Minecraft survival at least in a very long time so I highly recommend it. If you want to do this on Java in the Minecraft launcher go to installations, tick historical versions and then scroll to the bottom and create a 1.6.6 profile. You don’t have to start with 1.6.6 and you don’t have to do it for a week it’s entirely up to you.
Anyways have fun all!
Edit: Forgot to mention that I’ve put a board in my world where after each update I rate the previous version and state my favourite features. I also try to leave signs around my world everyday with the date on that show important things or stuff that I’m thinking. Finally I made a graveyard for all my favourite removed features ( R.I.P old gravel texture we miss you just not very much)