[Cthulhu_]

And this 3 years is kept up artificially - companes like Meta or, as a colleague of mine who works there now, Github / Microsoft, offer stock packages that they can only use after four years. It's a pair of golden handcuffs; they would move on a lot faster I'm sure if it wasn't for that + the wages offered.

Having Microsoft or Google or Meta on your CV is a very valuable thing to have, regardless of what you actually did there, because they're still perceived as having high standards.