It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or any Auras or Equipment attached to it, or any non-copy effects that have changed its types, color, power and toughness, and so on
Three decades later, Wizards of the Coast releases several hundred new cards every year across Standard sets, Commander products, and Universes Beyond collaborations
Their abilities are extended, allowing players to move between worlds with the right crystal, move through time, or even bind a summoned monster
Board wipes that remove permanents through other means, like Cyclonic Rift or Sunfall, do remove indestructible creatures
They won't change if the permanent with backup loses any abilities before the backup ability resolves
(6/6/2025) If you put an Aura on an opponent's permanent, you still control the Aura, and mana symbols in its mana cost count towards your devotion