I can't even imagine limiting myself to 3 magic items per character. I may pick up some mods for things I care about, but I'm not sure why anyone would want to turn Monks and Rangers back into the trash they were in PHB.
Not EVERY magic item requires attunement.
Pretty much every weapon and armor piece that has anything unique about it does. Sure, I could stack a +1 longsword on top of three more unique things, but I certainly couldn't use the interesting combos of items with lightning charges or momentum building that Larian is putting in. I'm excited for it to be more like older editions where getting new loot is exciting. One of the things I hated most about AL is that only one character would end up with something interesting at the end of a night.