Incompatibilities with and alternatives to nath

Question

I just discovered the existence of nath to auto-size mathematical expressions. But I also read that it has many incompatibilities and it also doesn't seem to be maintained anymore (last update was 2003). I found so far Are nath and xcolor incompatible? and nath and biblatex incompatibility. I use both (xcolor implicitly and biblatex explicitly) in my real world document. But nath seems to interfere with tikz and/or pgfplots, too, as I get errors from them when loading nath in my real world document.

As it would be very hard to narrow down all the points where nath and my other packages/code interfere to create a MWE, I'll ask some general questions with the hope to get a summary of the state, applicability and usefulness of nath nowadays in modern, complex documents:

• Is there a complete list of the incompatibilites that nath has and how to solve them?
• Is there any chance that I can use nath without having to code loads of workarounds or drop other useful packages?
• Are there nath alternatives that are up to date and compatible with modern packages?

Answer 1

Just to remove this from the unanswered questions:

Is there a complete list of the incompatibilites that nath has and how to solve them?

No, the list would be quite large, probably.

Is there any chance that I can use nath without having to code loads of workarounds or drop other useful packages?

No, the nath package does many sorts of evil tricks that creating some sandbox around it is impossible.

Are there nath alternatives that are up to date and compatible with modern packages?

I'd say no. There is breqn that tries doing automatic splitting of long equations, but it also has incompatibilities and seems to be unmaintained, at the moment.