The issue with block size is bandwidth, not storage.

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Can you elaborate?

The limiting factor for nodes is that nodes with too slow of a data connection cannot keep up to date with the blockchain. Storage is cheap and portable, bandwidth requires expensive infrastructure.

I always forget about bandwidth... ZAP!

Ahhh ok. I'll have to learn more

I still have so much to learn. When nodes compare chains, do they compare entire chains? How much bandwidth is required for that?