[Jommi]

You're only describing how it works with Bitcoin and other coins that are forked (git-forked) from it.

Some blockchains require a higher amount of consensus to fork (blockchain fork).

[XR0CSWV3h3kZWg]

Could you point to a PoW based cryptocurrency that isn't vulnerable to a 51% attack?

[Jommi]

you're right, I was mixing up some concepts in my mind, sorry!

For others who might be confused, here is a good resource:

https://bitcoin.stackexchange.com/questions/26999/supermajor...