The 20th million doesn't hit as hard as the 19th and when you make 2x your salary on the dividends on your stock you start to wonder why not just do something more interesting.

Sometimes people just want to work on cool stuff and have the luxury of being able to do that. Rosetta 2 is shipped and done.

You could have posted this in 1985 and been right. Talented people have options.

Citation needed?

I mean, there will always be long tenured people leaving, even without offers on the table

Some jobs get old eventually