Interesting insight! And why is slashing not enabled on Solana?

No idea! Possible that it doesn't modify the trust model that much and not what their users care about most.

Any chance you have more reading material on that? I remember Anatoly arguing about economic security in the debate with Justin Drake and I thought he had a compelling argument. I can't find anything useful online about this stuff. Seems that they've built this "on-the-go" and so it isn't really documented? Or am I not looking hard enough?

Yeah I didn't really find any documentation tbh, just a couple of independent confirmations that there is no slashing :).