Title implies ethereum-magicians.org is somehow new and "turning" Ethereum. It has been a main hub for Ethereum research & development since 2018. Ethereum has always been a community project.
Very weird submission, the linked post is 2 years old. Received no attention whatsoever, then the Copyright is updated to CC0 4 hours ago and suddenly gets posted to Hackernews.
Furthermore, the proposal is a bit non-sensical. It's still possible to fork Ethereum, as a staker you must choose which chain you want to stake. You cannot stake in both because you would get slashed. But if you decide that Ethereum-fork is your preferred version of Ethereum you can turn-off your Ethereum validators and only validate on Ethereum-fork. That's OK.
The market will decide which network is most valuable.
Ethereum operates under a permissionless proof-of-stake model, it has not been mineable since the Merge in 2022.
There are obviously large staking pools (including decentralized pools), but there is also a substantial community of people who stake from home on a validating node of their own. A good example is the EthStaker community on Reddit [1].
The compute and bandwidth requirements are very permissible (quad-core CPU, 16-32 GB memory, 2-4 TB SSD, 20/20 Mb/s), and the theoretical size of minimum stake has gone down substantially over time due to Rocket Pool [2].
