Less linear tech tree. Changes over 80 techs to have a crafting requirement instead of research.
Small changes concerning balance, gameplay, or graphics.
https://forums.factorio.com/viewtopic.php?f=7&t=125790 TLDR: All trigger tech progress will reset to 0 when you add or remove any mod to a save that has technologies. Edit: Is fixed for 2.0.31 on release