can someone who understands this much better than me show me how restaking doesn't totally turn a decentralized system into a fragile one vulnerable to cascading risk

ceo @ helius.dev, host @ lightspeed, ex coinbase — wartime shitposter

The long and short of it is that restaking is not the same as rehypothecation. Rehypothecation makes you vulnerable to market risk, which is an exogenous risk that you can't control. Slashing is an endogenous risk, it's 100% in your control not to sign two blocks at the same height.

Software Engineer @ Cadence Design Systems. B4: Stanford EE / Illinois ECE

In fact, I would advocate in the opposite direction and say that all PoS chains should merge together into one common validator set. If you are double-signing on some random Cosmos chain, why should ETH or anyone else keep you as a validator? It's in everyone's interest to cut you out across sovereign chains.

I actually think Solana is just this. 

Individual fee market + account-based txn processing + one shared validators => many individual PoS-based L2 merged together.

views are my own, protocol @ eigen labs; prev working on decentralization @ gitcoin, llama, stanford medicine.

Well, I think even more explicitly, Avalanche is a common validator set signing on to different 'subnets' that are essentially sovereign.