Bitcoin’s Decentralization increases as a full node becomes cheaper.
The bottleneck is disk I/o not bandwidth or storage. But it’s important to keep the cost of verification low as that ensures that the system remains open. Pushing physical limits guarantees that most can’t participate. Read this:
Re-reading and this is a great read. "A hard fork elevates those who are Technical, Persuasive, or Endorsed, to 'non-peer' status."