That's all well and good, but there's some content that people have come to...while not necessarily rely on, but more come to expect to have access to, like me and AE. I loathe chests for all but the most basic of storage tasks, or handling items that don't stack and that I don't need in large quantities, like division sigils or old tools. Storage Drawers are wonderful, but AE is a force unto itself, a storage solution (at minimum) that really has, to my knowledge, no parallel. With the proper setup, you can store millions of items, containing a titanic chest room in the space of a few blocks. It frees up space for things like machinery, enabling you to more conveniently explore the content of other mods.
A different example, a more personal one, is Reika's suite of mods. RotaryCraft, ReactorCraft, ElectriCraft, and ChromatiCraft have come to be fixtures in my packs, something I always have to look forward to playing with. Few things are as satisfying as using your first batch of HSLA steel to make automated (if slow) ore tripling via a grinder and friction heater'd furnace. I love making ChromatiCraft glows, giving me lights that don't look like crap, or creating tile accelerators to make things run at ludicrous speeds.
While I certainly welcome new, different content, it shouldn't have to come at the cost of the things I've grown to enjoy. Why not have both?