My guess is that people who hold large Mrai balances will want to run a node, otherwise their holding will devalue.
What is system requirements to run RAI node? Wallet is CPU incentive. Is VPS enough or you need something like dedicated 16-core Xeons? Also the transaction rate grows...
The CPU usage is put on to transaction generators. Being a representative is extremely light. The representative nodes I run are on 1 core 4$/mo vps machines.
The goal is to make running a representative as cheap as possible so we can get a greater diversity and decentralization.