I was counting down the days for this and the Definitive Edition soundtrack release to hit iTunes. I've been slowly making my way through the 3 soundtrack over the past couple days. I hope that every time I buy these, Nintendo notices and thinks about it. As far as I'm aware, everything from the Xenoblade series except Xenoblade Chronicles X is now available for purchase and presumably streaming.
I applaud Monolith Soft for releasing their soundtracks like this, and I wish we got this for other franchises published by Nintendo. The Legend of Zelda would probably be my top pick, but Mario has some great music as well. I don't have a ton of experience with the series, but I figure the Pikmin series might have some good ambient tracks. I wish Nintendo would take a page out of Square Enix's playbook when it comes to how they handle music.