If I could execute my share options finally and have enough money to reasonably last me until the end of my life, I'd probably go a similar route.
It's probably bad for Twitter in the short term, but allows some upward mobility in the corporate structures, resulting in more motivated execs at the top level.
Hopefully this is the beginning of the end. With the deaths of several notable celebrities like David Bowie, 2016 is already turning out to look like a miserable year so far, and the results of the Presidential election in November are unlikely to be good, but if Twitter goes belly-up, at least we'll be able to count that as one of the year's high points.
What's wrong with Twitter? It's a great service. It pretty much becomes whatever you want it to be.
Both VP of Engineering left and Product Chief left.
Would be interesting to read some discussion of the company's future. As opposed to getting bogged down in endless gripes about the UI of twitter.com, as tends to happen here.