Asus is wayy worse than apple when it comes to lauch products, they have a huge number of tablets in the market, and look at he padphone example....
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And was the samsung who provided you the LATEST android version ?
Maybe in the next moth they will do that.
Samsung don't have to, Google provides the OS, and honestly id rather have stock android than touchwiz anyway, Don't confuse the maker of the handset, with the maker of the OS however, unlike apple, the two are not the same.