Ultimately, all full nodes will also be light clients--that is the nature of the upcoming sharding changes.

It does not make sense to have a full node for every light client. A full node is perfectly capable of safely serving hundreds or thousands of light clients.

Also there are several initiatives towards incentivizing more light clients. I am working on one: https://vipnode.org/

I wasn't implying a full node for every light client, of course that doesn't make sense. People using light clients in their products, like a wallet or DApp, are probably adding tens to thousands of light clients. When you add that load to the network, you should also deploy a few full nodes, and probably add them as static peers if you want the application to work well.

> Also there are several initiatives towards incentivizing more light clients. I am working on one: https://vipnode.org/

This looks cool, I may have to give it a try!