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Quite interesting observation, mate. I've always thought that increasing the block size would make the chain bigger than ever as blocks will get automatically filled to 32mb. But, now I understand that even if block size is increased, blocks won't necessarily fill up to 32mb. Considering your research, it seems that a 32mb block size is still safe to use within a cryptocurrency. It will all depend on how technology improves overtime, and prices become reduced to a level where people could afford new technologies to maintain their full nodes.
With Moore's law, this will surely happen so it shouldn't be much of an issue increasing a block size to a greater amount in the future. I believe that its best to implement a dynamic block size system to Bitcoin Cash instead of a fixed size block size like 32mb. That way, the network could adapt to a specific block size depending on the load of transactions, among other factors. Bitcoin Unlimited had such feature, so it could be easily implemented into Bitcoin Cash in the future. Just my opinion

first of all if you don't use the space then creating it is pointless. it is like buying an airplane to go to your job which is 1 block away from your house!
secondly when you open up space (32MB) you are making spam attacks easy. it doesn't cost anything to fill these 32 MB blocks and cause havoc.
thirdly you are not just a leach, as a contributing node you want to connect to different nodes and send/receive blocks and transactions. this means downloading and uploading. your monthly traffic is going to be ridiculously huge. check out Shorena's node status
here, you will see very interesting stats. he is already spending 1-2 TB traffic per month.
finally it has never been just about the size. the problem is Zin-Zang doesn't understand anything about bitcoin. you are not downloading a file. you are downloading a block. which means you download the blocks, verify each transaction and then add it to your blockchain. that verification is the bottleneck.
According to the idiots pooya87 follows such as Blockstream , 8 MB blocks was impossible and Bitcoin Cash proved blockstream all to be fools.
Problem is Blockstream had an agenda to get LN activated, as that is what the bankers paid them to do.
People like pooya87 that see bitcoin as a religion instead of a technology are stupid enough to believe the nonsense , blockstream puts out.