Status for the update to 1.12: Time spent: ~850 hours. Updated: ~98% for base, ~95% for machines and ~80% for conduits. Stop nagging us, or we might notice we know ways to spend our time doing things that are more enjoyable. Progress and discussion can be found on Discord.
Ender IO is a full-sized tech-mod. I could compile a complete list of features and hit you with a 2 mile long wall of text, or you could jump to YouTube and watch one of the "About 274,000" videos there. Just be aware that things change over time and Minecraft versions.
EnderIO requires a reasonably current Forge version and EnderCore.