[marcelsalathe]

Agreed. But just say that. No need to pretend taking responsibility, which is defined as facing consequences when things go bad.

“As CEO, I’m truly sorry to those impacted. But I strongly believe that this change is what is needed now to make sure Dropbox can thrive in the future.”

[pizzathyme]

Makes sense. "I take responsibility" conveys that they will also suffer consequences, which isn't true.

"I'm the sole person who made this decision" is probably closer what they are trying to say.