Bitcoin survives a 2-year long, 3,000+ node simulated Sybil Attack. Most of the network didn’t even notice.

Why not?
Miners secure the chain, enforcing consensus by Proof-of-Work. Thank you miners!

So does running a node matter?

Yes!

Noderunners protect the network by verifying each block against consensus rules.

1 honest node with the real chain beats 3,000 fake ones - as long as it can reach you.

Thank you, noderunners!

More here:
https://stacker.news/items/1463982

https://velascommerce.com/bitcoin-noderunners-matter/