Because the CEO serves at the pleasure of the Board. The board decided it was time for him to go.

Then it was a negotiation about how.

Sometimes people can see the writing on the wall and choose to not burn down their life’s work on the way out.

Not sure people have grasped how serious this all is; the second affair alone would fell most CEOs because it was with an employee.

But my guess is, he'd rather resign on this note than what will come out in a few weeks.

Presumably he was not given a choice by the board.

There is evidence of a second affair that is also problematic coming out, the BBC had some reports.

Resignation means that he can start liquidating his shares without input from shareholders or directors.. Divorce will also be likely. Affairs with the staff would matter if he had promoted people; who knows what else is in that stack. He had planted his own kids with no experience in tech as executives there too . He is a zillionaire though and he has enough cash for many generations.

Don't worry about him.

He didn’t resign he “resigned”

Because it would be damaging to the company which he founded and has a massive stake in, both financial and personal.