Is Blockchain Really Immutable?

Some Bitcoin Writers (Jimmy Song in particular ) have argued that Blockchain has only ONE proper function - which is to maintain the immutability of Bitcoin transaction records. All other functions - are simply left to traditional databases.

In today's Cancel Culture - where even cartoons are not spared from revisionism - can Blockchain be the sole oasis of preserving historical records - as so many have hoped?

Or, will it also fall - like one of the many Civil War Statues in America?

More to the point : Will Steemit even be around 20 years from now?

The Internet is a fluid place. It looks today (in 2020) nothing like it was in 1999. Few Websites survived the Dot Com Crash of 2000.

When you consider that the entire Cyberspace infrastructure is nothing more than permutations of on and off transistors - the reasons why this is so - become obvious.

Memories can easily be wiped.

Blockchain technology was supposed to overcome this vulnerability. They key lay in replication of information at every node - coupled with encryption. Somehow, a dynamic permanence seemed possible - much like how all the cell in a human body carry all the genetic code needed to build it.

But what if that organism dies?

What happens to its code then?

Bitcoin relies on the Internet to keep it alive. So, unless there is a complete Global shutdown of ALL Blockchain Nodes and Miners - it will continue in perpetua - at least until that last coin is mined.

But what about Steemit?

Can smaller - centrally coordinated blockchains survive the same type of culling we saw happening in 2000?

My question is - can blockchains go extinct the same way that certain species of flora and fauna - vanish from the Earth?

Immutability does not mean - immortality.