The original intention of Satoshi was "one-cpu-one-vote". Everybody would run the same full node and would simultaneously mine and have a chance for a mining fee.

But gradually mining got "out of control" and separated from full nodes. Now full nodes are still essential to the network but they don't get compensated.

If the above view is correct, can this situation evolve into a threat? (Fewer and fewer full nodes).

Are there other cryptos providing an implementation closer to "one-cpu-one-vote" ?