You can't compare percentages! If Amz sold 1 kindle last year and two this year, that's 100% increase. Percentages can't compare. It's easier to obtain high pct change with small numbers than with large numbers.
Except profit share, usage share (internet, apps, shopping, etc), US market Share, the minds of people. But yeah, every where.Android already leads by a massive market Share worldwide. Why hasn't it caught up with Apple on usage share? Easy, a lot of Androids are used as feature phones.
Somehow I may have over edited and removed something your wrote. There is nothing wrong with iterating as long as the baseline was successful. Ford doesn't redesign the Mustang every year. Chevy doesn't redesign the Corvette every year either.