The problem is... as more pieces get added onto the backbone, you can often end up with the entire body being called "bitcoin".

And then, i could agree with bitcoin maximalists.
Everything else can be added to bitcoin, so bitcoin will be all...

But, this is just semantics... or is it?

The linux operating system includes a lot of very valuable programs.
That can all be scripted together to do all kinds of things.
And they are so ubiquitous in linux distros, that they are considered linux

And we should note that Gresham's Law also works towards bitcoin becoming the backbone.
As more people store the bitcoin, it becomes more stable, and more of what everything else gets priced in.

I think this will be the real test about whether adoption has happened.
How many of the things are priced in bitcoin?

Now Selling! Shoes 1.99 satoshis

But, will the whole structure/body be called bitcoin?