alt Hacker NewsSnapshots do let you upgrade worlds to future releases and you don't need to do any NBT editing, just upgrade the game and load the world.
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nkrisc • last Sunday at 9:42 PM
Though there are of course no guarantees there won’t be problems with the world.
Huh, I guess I assumed that based on the behavior of most of the experimental flags offered on world creation. Has that always been the case?
I think mojang is taking a turn away from experimental feature flags these days, so I guess this situation will get better over time.