Atari in 1983 went from the leader in video game production to completely imploding. In 1979, four of their best programmers left after demanding equity in the sales and were refused. Their CEO Ray Kassar famously said, "You’re no more important to those projects than the person on the assembly line who put them together. You’re a dime a dozen. You’re not unique. Anybody can do a cartridge.". They left and formed A…
I agree 100% with much of the sentiment here that creators deserve respect and a cut of the spoils At the same time, it really depends.... I'm pretty confident that there are very few engineers at FAANG that can't be replaced. I'd also expect there are very few engineers at Epic, Activision, Blizzard, Naughty Dog, Sony, Rockstar, Ubisoft, Valve, etc... that can't be replaced. Sure, if 30%-70% of the team left on any…
Most developers working on products, not just at FAANG, can be replaced but it's very costly.
You need to find a developer in the specific niche he was competent. Not easy because there is a shortage of developers. Then he needs to get up to speed with the stack and the processes used in the company.
So in theory yes, engineers can be replaced. In practice it's costly, with no guarantee of getting the same productivity, and the process to find someone will leave you with one person less for many months. When you have competent engineers that you want to keep, the last thing to do is to play the "I don't need you anyway" card.