LogFAQs > #971742622

https://www.reddit.com/r/Minecraft/comments/1194vgu/welcome_to_the_grid_1194_prerelease_1_is_out/

Neat 1.19.4 should be soon. In a week or two probably. Potions no longer have the enchantment glint and now have distinct colors (why did this take them 10 years lol). New high contrast menu option for accessibility features, tons of bug changes, and world loading was streamlined. So the way it worked before was that every time you loaded a world it would check all nearby chunks to convert them to the latest chunk format. It will now only do this the first time you load a world up in a new version. After that loading a world should be much faster.