Ethereum

1/ I believe that the chain temporarily halting for 6-12 hours is a preferable option to penalizing over 80% of the stakers, especially until we attain a sufficient level of client diversity within Ethereum. We've learned over the years that downtimes don't kill chains.

Ex-/coinbase. Creator of Coinbase Wallet & Cipher Browser. Eng Lead $USDC. Advising /polygon Labs, @family, and @tribes. petejkim.twitter

2/ I acknowledge that some may view the potential disastrous outcome as a means to encourage client diversity, but it's important to note that the majority of everyday users rely on third-party services for staking and have limited alternatives.

Why would over 80% of users be penalised in this instance? No one is asking for geth to shut down. I think people would even be a lot more comfortable with geth close to but not above 66%, which is the threshold after which an invalid block could
be finalised by a buggy client

Robust Incentives Group @ Ethereum Foundation

https://rig.ethereum.org

Hmm but why can we pick between this or 6-12 hours downtime? I don’t really see why this is a choice we are making. We can accept a manual reboot to save the Geth validators in the current configuration today (technically I mean, not clear if this would be the decision)

84% of the staked ETH are on validators that use Geth. If those validators were to finalize an invalid chain, over 90% of their staked ETH will be destroyed by the inactivity leak mechanism until other validators have the required 2/3 majority. 90% of 84% is over 21M ETH (~$50B) destroyed.