Earlier quoted context omitted.
The increased block size increases the amount of storage required to run a full node (and also the bandwidth required to sync nodes). Even at just 100 tx/sec, you need 14x the storage of a bitcoin node (so around 10TB vs 700GB for bitcoin). That puts it out of reach for many people to run and so making it more centralised. To compete with a payment rails like Visa and Mastercard, you'd need to increase that to 10000+…
If you mean a full non-mining nodes (which only a few people really need, merchants, exchanges, ...), read points 7 and 8 of the whitepaper. For full mining nodes, you need expensive specialized hardware anyway. Non-mining nodes are just observers that do nothing good to the network. Is like going to war with popcorn as a weapon. Mining nodes are the only ones than can include transactions to a block. https://www.bit…
The HW to run bitcoin is extremely cheap - less than $100. All you need is an old laptop or Raspberry Pi with a 700GB of storage, and a ham radio/dial-up internet connection to another node.