I can agree with the user above, it's kind of not good if the developers aren't communicating properly. Why was this change made? It makes new worlds more difficult.
I wasn't that knowledgeable on the fill command which is why I used Worldedit, but I mined at Y: 11 for ages on 1.17 and barely found any diamonds. This is a massive change when you look at the long run of things.
Zedanity
I can agree with the user above, it's kind of not good if the developers aren't communicating properly. Why was this change made? It makes new worlds more difficult.