I follow most of that,
Not with details but enough to understand somewhat.
I was just curious to situations like forks who decides what stays and what changes.
Nodes decide which set of rules to follow and the miners decide which chain to mine. Bitcoin Cash is a hard fork of Bitcoin and as you can see from hindsight, nodes and miners mostly stayed on the main chain and didn’t go with the fork. If you hold bitcoin and stay on old rules you are awarded same amount of new forked coins so you could sell them and buy more of your chain’s sats so 🤙 
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