Dumb question but who do people care so much about updating their games? Did the newer version of Smash Bros. actually add anything? I can understand Mario Kart 7 as it fixes some glitches. I noticed even Majora's Mask has an update that people are seeking yet the game doesn't even have online play. Genuinely curious.
The newer version of Smash bros added amiibo support and online share of replays.
Majora's Mask update fixed a glitch that could allow the player to have all masks (and other bugs).