Why do large blocks increase the probability of chain reorgs?


After the recent two chain reorgs taking place in Bitcoin Cash SV, I am finding a number of developers stating that large blocks are the reason for the reorgs:

"Almost each time someone is trying to produce a very large block on the $BSV chain, there’s a reorg." Nikita Zhavoronkov, lead developer at Blockchair

“This is basically exactly the problem the BU gigabock testnet identified. At sizes > 100mb the mempools were so out of sync that blocks were basically transmitted as full blocks.

"BSV had ONE 128mb block and it caused a six block reorg. On the BU testnet sustained 128mb blocks caused a total breakdown of the chain where there were so many reorgs that every node had a different view of the state of the blockchain. And would you believe barely a day goes by where the BSV supporters don’t mock me pointing this out as if it’s sooooo obvious how wrong I was.” Chris Pacia, CEO of OpenBazaar

What is it about the nature of large blocks that makes it more likely that the blockchain will reorganise itself?


Article source: “https://bitcoin.stackexchange.com/questions/86169/why-do-large-blocks-increase-the-probability-of-chain-reorgs”