It wasn't a question of elegance. Clearly the webOS way is the more elegant and polished solution. I liked being able to partially view another card while typing in anothe Would like to see it on a tablet with two full size cards being viewed in landscape mode. Quite a few just couldn't figure out how to multi task, and others thought it was button press intensive when it requires less presses than webOS. I'd also like to see a poll on how many cards people leave open at a time. I'm sure if 6-20 was an option it would have less votes than 1-5. I think it's unrealistic to think people are using 20 cards at a time. At most I have 3-5 open. And one plus with Android is it does recent apps too. So if you swiped up on an app, it is gone and no longer part of multitasking. Android will have closed apps on the list if they were recent.
The windows alt/tab doesn't work because there is no direct button press. You have to cycle through icons like you have to cycle through cards on WebOS. So that reference is closer to webOS than android.
And don't get me wrong, cards are one of the features I'd like to see on Android. I'm just not buying a lot of your argument.