I don't think they are. I think at most companies most people are replaceable. Each company has a few key players that are truly cornerstone employees. Almost e

I don't think they are. I think at most companies most people are replaceable. Each company has a few key players that are truly cornerstone employees. Almost everyone else can be swapped out as needed. Not saying losing a key Sr. wont cause a set back but with the right hire (and they are not that scarce) they are back on track in a bit. Most of us think we are super valuable and that a company will suffer when we leave but reality is that it rarely happens; there are of course exceptions. Blizzard already the has the IP, everything else is just cogs.