Agree. But at the moment it cost around 60$ ( not sure its full node).

If more use ( demand) price should increase. If we see a problem it becomes to centralize we can reward not only top 20 high ( because they can pay anyway).

like split rewards more or increase the rewards by some %.

It's not impossible. @pharesim write some time ago, a node cost him years back around 1000$ a month. today he pays under 100$.

So it's super cheap compared to any other chain.

even if blocksize increase by a factor 20, would not increase the cost by factor 20. Would be lower. And disc space is cheap.

Sure if we came to a point we would need 1000x more space, sidechains are the solution or witnesses becomes datacenters. I agree 100% with you at this point. Because at this point it will become centralized ( but only on today's tech).

We don't know what the future brings and 10 years or even 5 years, the tech can become again 10x (or higher if we look back all around 400 days factor 1.7-2 from the past).

So I don't worry that much. Also, work can be done like in the past and make the system cheaper. I would really love to hear @blocktrades about this topic, because I'm sure he knows more about it as we both :)

Edit: and bigger Blocks make hive more valuable? It should be like a solar panel that generates x of MWH and not generates more. So the value should increase? Depending on demand? So the system should be able to fix itself if demand is high enough.