Yeah, but the question is whether a DAG is a good mental model for a VCS. Just because that's the underlying data structure doesn't mean it has to be the user interface too.

Exactly. This seems to be a point that the "Git is easy" crew doesn't understand. Not everyone (in fact, very few) find going into that depth for something that's nothing more than a tool to be reasonable. Reminds me of the Gentoo users that used to say compiling everything is a great idea for an OS.

I find that people understand "linearized" concepts easier than other kinds(DAGs included). When elements are left-to-right or top-to-bottom, you can read what is going on at a glance.

So the next major step in VCS technology will most likely do something to help linearize our views and reduce the tangling that comes into play with any tree or graph structure.

Don’t we already have that in some respects?

a) Most people’s git workflow might as well be linear.

b) rebasing a development branch onto master literally linearizes it

Where git shines though of course is where you can’t get away witha linear model

A big part of learning anything is understanding - at a fundamental level - what operations are being executed by whichever tool is being utilized.

So if you will pardon the paraphrase, I think the main problem is that many developers don’t take the time to simply learn git.