On: Jack Dorsey Takes Over Product Again at Twitter as Executive Chairman

[rudiger]

Clarium Capital has been performing terribly for years.

However, I agree with your general point (that it is possible for one person to focus on two large projects).

[Herwig → rudiger]

Still, Executive Chairman and CEO are two rather "big" titles. If he can juggle both and be successful I will be impressed. We will never really know how much effort he puts into each role.