From my perspective, Twitter has been in maintenance mode for years. What significant changes have been made that requires thousands of engineers? I'm being ser

From my perspective, Twitter has been in maintenance mode for years. What significant changes have been made that requires thousands of engineers? I'm being serious here. The interface is still the same clunky mess, the home page has been rearranged a few times, and now we have even more convoluted rules as to what counts towards your 140 character limit.