It's the mining aspect that's concerning, unlimited reached >40% of blocks mined yesterday if I'm not wrong. Also anyone can be a node, these numbers are hardly reliable
Ahh, I see now... So this is really about nodes miners are running. Ok, thank you for the explanation.
No actually nodes are ran by many other normal users and bitcoin service providers along with the miners but miners play important role in hard forks. After hard fork the network which will have majority of mining power will survive while the one which doesn't have much support from miners will ultimately die
I don't think this is a correct explanation
After the fork, the fork hashing power becomes inconsequential to the remaining miners. It is the same as if some miners left and then a new altcoin sprang up which started using all this power. I'm heavily inclined to think that people are overexaggerating the power of miners. In other words, there is no such power at all, it is an illusion mostly. If most users stay with the old version and shy away from the fork (and that's what full nodes supporting SegWit explicitly tell us), all this hashing power will be utterly useless and eventually just wasted away