https://docs.solana.com/running-validator/validator-reqs https://docs.solana.com/running-validator/validator-reqs describe a high-end dedicated machine, perhaps

https://docs.solana.com/running-validator/validator-reqs https://docs.solana.com/running-validator/validator-reqs describe a high-end dedicated machine, perhaps out of range for most individual hobbyists. But it seems perfectly sane for any reasonable-scale business building nontrivial features on top of Solana to run its own validator. And https://docs.solana.com/clusters https://docs.solana.com/clusters describes exactly how to run validators that connect to the test and mainline-beta networks. IMHO that's more than enough to provide robust decentralization. I can't speak to Solana's other claims but there seems to have been a ton of thought put into the scalability of the system.