There are no bottle necks 128MB. DASH tested 400MB blocks without a problem. Plus miners control how large blocks are. This is just an upper limit.
Can you provide a link to this dash testing? Can you provide a link to any dash testing? Thanks.
google.com, dash 400 mb blocks, 1 year ago.
I did google it. Dash hasn't tested 400mb. They are *aiming for 400mb*. Their stress test accomplished 500K+ on-chain transactions.