I work for one of said teams, doing datacenter cyber-security. You could say "trying" is my day job. Since we're internal and we manage a lot of capacity, we d

I work for one of said teams, doing datacenter cyber-security. You could say "trying" is my day job. Since we're internal and we manage a lot of capacity, we do often provision and roll our own equivalents of things that cloud providers will sell you, rather than just buying a cloud solution. It's often ambiguous whether it was a good use of time/money. If it weren't for the economies of scale that kick in at the sheer size of this operation, it would definitely not be worth it.