http://breezewiki.catsarchywsyuss6jdxlypsw5dc7owd5u5tr6bujxb7o6xw2hipqehyd.onion/minecraft/wiki/Java_Edition_removed_features
The first versions of Infdev, which did away with such boundaries, therefore had no such effects, instead exposing the existing hard limits of the game (although experiencing these was effectively impossible due to floating point bugs rendering the game unplayable much earlier).