Biggest risks to Ethereum?

I’d like to get a thread going here on Ethereum risks. We’re all so bullish, but fact is crypto is risky! I’m a crypto noobie, but I work in cybersecurity and I’m paid to think about this.

I’m not looking for general crypto risks, like regulation, 51% attacks, getting your wallet hacked or locked out of your wallet. I want Eth-specific risks!!

Here’s a few I can think of off the top of my head, but like I said - I’m a noobie.

1. If Vitalik disappears, will Eth pull through long-term? While he doesnt want any power, from what I can tell he’s kind of the life blood of the project

2. New entrants. Cardano is getting pretty popular, and you have to imagine other Ethereum-type networks will make an attempt

3. Something about high fees and or slow transactions? Even after EIP 1599 and Eth2...there will likely always be a cheaper/faster alternative

What else y’all got?