They're still around! Well, Tekkit has stopped developing modpacks, but plenty of mods are still being updated, most of which are available on Curseforge. For a

They're still around! Well, Tekkit has stopped developing modpacks, but plenty of mods are still being updated, most of which are available on Curseforge. For a Factorio-like feel I'd say Create, Immersive Engineering and the modpack Omnifactory are great.