> Sometimes you have to find the limit of your software/hardware.
The point is that there does seem to be a software limit, but there shouldn't need to be a particular limit there. There's certainly not a hardware limit, since an iPad can run circles around almost all of the computers of the era when LaTeX was written. Unless you believe that the TeX system represents an almost magical, once-in-a-lifetime, impossible to replicate achievement in software engineering, there's shouldn't be a software limit either, but the code base is so complicated that there does seem to be one.
From what I can tell, the software limit is that everybody has a different set of custom macros and styles that they use, and that distributing extra code is a violation of Apple policy, one that can't be fixed unless you get rid of not only the reality of LaTeX but the idea of LaTeX as a macro system.
The point is that there does seem to be a software limit, but there shouldn't need to be a particular limit there. There's certainly not a hardware limit, since an iPad can run circles around almost all of the computers of the era when LaTeX was written. Unless you believe that the TeX system represents an almost magical, once-in-a-lifetime, impossible to replicate achievement in software engineering, there's shouldn't be a software limit either, but the code base is so complicated that there does seem to be one.