If a technology doesn't depend (either directly or indirectly) on the science packs it needs, these missing dependecies are added.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
https://mods.factorio.com/mod/SciencePackGaloreForked https://mods.factorio.com/mod/SciencePackGaloreSpaceAge
simply doesn't work with either ex. "Raw Science Pack" has nothing after it in the tech tree, despite appearing in tech costs
Classic load order issue, added optional dependency on SciencePackGaloreSpaceAge for 0.3.5. SciencePackGaloreForked doesn't seem to have a 2.1 release.